Monday, December 29, 2008
The Ephemeral art of Andrew Goldsworthy http://scienceblogs.com/chaoticutopia/2008/12/the_ephemeral_art_of_andy_gold.php
Andy Goldsworthy's Rivers & Tides http://www.amazon.com/gp/product/B0002JL9N6?ie=UTF8&tag=chaoticutopia-20&link_code=as3&camp=211189&creative=373489&creativeASIN=B0002JL9N6
New Year is upon us. Happy Peaceful New Year, Salam Muharram, Slainte Hogmanay, Selamat Tahun Baru, Bonne Année, Gungheefatzhai, Feliz año nuevo...
The Karuk people tradition of World Renewal: The altar is built in the form of a crescent up to eye level in height. It is within this wall that the Medicine Man Healer gathers the powers given to him to make medicine for his people - to bring an abundance of fish from the river and good hunting from the forest. The spring from which the Healer drinks is also sacred and kept covered to protect its purity for the next World Renewal Ceremony.
A central act in the Wiyot people's spirituality is an annual World Renewal Ceremony held at Tuluwat village. Indian Island, formerly called Duluwat Island, was and is the center of Wiyot world. On the island a ceremonial dance was held to start the new year. The ceremony was called the World Renewal ceremony. All people were welcomed, no one was turned away. The people ate mostly clams and acorns and made long carved log canoes. Healers and ceremonial leaders were mostly women, who got their powers on mountain tops at night.
I re-cycled a small woven sphere left there for renewal.
New Year celebration, colorful geodesic sphere at New York City Times Square.
200 years since Darwin: Grand Rounds ~ Evolutionary Medicine http://www.moneduloides.com/?p=850
Hajj pilgrims http://wallpapersyi.blogspot.com/2009/01/holy-hajj-pictures-2008.html
Saturday, December 27, 2008
1560s, from L. torus "knot; cushion"
Basking shark vertebrae, from Coastal Paleontology [Unrelated to post title, but cool, like this stonehenge animation]
More info on roof, and how the stones were moved, quite similar to Dick Parry's
idea of how the Giza Pyramid stone blocks were moved in 1/4 circle wood cradles.
rock n roll
"No one knows what this crescent-shaped tool was used for, though it has turned up in association with Clovis points elsewhere. While the tool's middle edges are dull from grinding, its ends remain sharp. It is made of chert from the Green River Formation of southwestern Wyoming and contiguous parts of Utah and Colorado. This is not far from where the cache is believed to have been found, the three corners area where Utah, Wyoming, and Idaho come together."
Crescent-shaped knapped stone (scraper?) from the Holocene have been found at Lake Baikal, Siberia and San Miguel Island California and the the Great Basin of Utah and coastal sites, often of obsidian or chert. Neat pic.
Thuyen Thung chai round basket boats, using woven split bamboo and plant sap as water sealant varnish
round basket using similar weave
typical woven pack basket
Video on hyper-origami. Math * Computer -> a single flat sheet of paper can form super complex forms. Used for folding metal stents in arteries, and folding mirrors in outer orbit space. http://www.ted.com/index.php/talks/robert_lang_folds_way_new_origami.html
I made a paper sphere by making a takraw ball of 6 paper strips, then another long strip to make 12 trefoil knots (pentagons) which filled in the pentagon holes of the takraw ball. Cool. I'm sure it's possible to make a sphere from one single folded sheet of square paper, but it would be complex hyper-triangulated.
Knots and lashings
Torus: knot or cushion, Latin (Egyptian. Horus?)
"upright slab," usually inscribed, 1820, from Gk. stele "standing block, slab," related to stellein "to set in order, arrange"
direction to printer to disregard correction made to text, 1755, from L. stet "let it stand," third person singular present subjunctive of stare "to stand, stand upright, be stiff," from PIE base *sta- "to stand, set down, make or be firm" (cf. Skt. tisthati "stands;" Avestan histaiti "to stand;" Pers. -stan "country," lit. "where one stands;" Gk. histemi "put, place, weigh," stasis "a standing still," statos "placed," stater "a weight, coin," stylos "pillar;" L. sistere "stand still, stop, make stand, place, produce in court," status "manner, position, condition, attitude," statio "station, post;" Lith. stojus "place myself," statau "place;" O.C.S. staja "place myself," stanu "position," staru "old," lit. "long-standing;" Goth. standan, O.E. standan "to stand," O.N. steði "anvil," O.E. stede "place;" O.Ir. sessam "the act of standing").
Stalactite = stylos, galact = drip... did the first temple columns derive from cave stalactites?
Friday, December 12, 2008
Saturday, December 6, 2008
Onderwerp: Elaine Morgan: 88 Years old and still head and shoulders above
your typical anthropologist
Anyone interested in human ancestry at the seashores should see Elaine Morgan talk on
At 88, she is still knocking 'em cold with her common sense and logic.
Here's footage of a talk she gave recently at UCL.
Part 1 : http://uk.youtube.com/watch?v=aRrRzdIYzac
Part 2: http://uk.youtube.com/watch?v=lHtWADJgsQI&feature=channel
Part 3: http://uk.youtube.com/watch?v=Sra-MsmehAI&feature=channel
Part 4: http://uk.youtube.com/watch?v=IgF0qeGWJI8&feature=channel
And here's an interview she did earlier...
Wednesday, November 26, 2008
164ma skye turtles in Scotland
220ma 1/2- shelled turtles in China
Also, vets used ultrasound to find a gallstone in a soft-shelled pancake turtle.
"They also observed that the phase of the spontaneous circadian rhythm did not lock. This is because, circadian rhythm is very flexible. In humans, the cycle repeats about every 24.2 hours. The circadian clock is reset by light and our circadian apparatus is exquisitively sensitive to lights falling on the retina. The retina sends this light (for synchronization) to the SCN via the retino-hypothalamic tract. This synchronization or entrainment can now 'phase lock' the circadian rhythm.
Clinical implication of circadian (circa=about; dian=day) rhythm is enormous. Our sleep-wake cycle, growth hormone and cortisol secretion are only a few example. A person in whom the circadian period is short will rise early (early bird?) and a 'night owl' will have his/her circadian period short. Curiously, our sleepiness, tendency to sleep and occurrence of REM sleep peaks (resulting from endogenous circadian rhythm) when we are about to rise; and our endogenous clock reaches its peak about 1-3 hrs before our habitual bedtime.
Humans are the only species with exposed white sclerae.
20% of European/Asian humans sneeze at bright sunlight after having been dark-adapted. Humans can see clearly underwater (conclusively tested in Thai Moken children seafood forage divers and Scandinavian children) by employing 'visual accomodation', which is a form of dark-adaptation of the oculomotor nerve (CN#3) in association with the trigeminal nerve, the pupils constrict voluntarily, the complementary opposite of the pupillary light reflex and photic sneeze reflex, since this is not found in our mammalian kin, it must be assumed to have occurred in our seashore diving ancestors as selection for improved seafood foraging efficiency.
The Edinger-Westphal nucleus supplies preganglionic parasympathetic fibers to the eye, constricting the pupil and accommodating the lens. Edinger-Westphal nucleus (also known as the accessory oculomotor nucleus) is the accessory parasympathetic cranial nerve nucleus of the oculomotor nerve (cranial nerve III), supplying the constricting muscles of the iris. http://en.wikipedia.org/wiki/Edinger-Westphal_nucleus
The accommodation reflex is a reflex action of the eye, in response to focusing on a near object, then looking at distant object (and vice versa), comprising coordinated changes in vergence, lens shape and pupil size. It is dependent on cranial nerve II (afferent limb of reflex), higher centres and cranial nerve III.
When bright light is shone on the eye, it will automatically constrict. This is the pupillary reflex, which is an important test of brainstem function. Furthermore, the pupil will dilate if a person sees an object of interest.
The oculomotor nerve, specifically the parasympathetic part coming from the Edinger-Westphal nucleus, terminates on the circular iris sphincter muscle. When this muscle contracts, it reduces the size of the pupil. The pupil gets wider in the dark but narrower in light. When narrow, the diameter is three to four millimeter. In the dark it will be the same at first, but will approach the maximum distance for a wide pupil 4 to 5 mm. The constriction of the pupil and near vision are closely tied. In bright light, the pupils constrict to prevent aberrations of light rays and thus attain their expected acuity; in the dark this is not necessary, so it is chiefly concerned with admitting sufficient light into the eye. The pupil dilates in extreme psychical situations (e.g., fear) or contact of a sensory nerve, such as pain.
Wednesday, November 5, 2008
Friday, October 24, 2008
I think I prefer to tune in to the sounds of the sea, with the middle ear canals saline-filled to still the dissonance of air conduction against bone conduction while diving. But since I've never done this (being too cold here to try) I'll just have to wait til I get to the tropics again, if ever, to hear as a dolphin hears (in a sense) the echoes of the dive song...
listening most intently at depth while my backfloating wife/dive partner hums a lullaby to our nursing infant son and daughter at the warm sunlit surface of the tropical lagoon, she in turn listens to the water for my dental-lingual clicking, knowing I'm soon to bring up some delicious fresh seafood from the ocean's banquet. I can't think of a better harmony than that little duet...
not a mythical haunting symphony of the sailors' sirens of the seas,
nor the obnoxious cacophony of the chattering rainforest monkeys,
nor the roaring of beached sea lions or trumpeting of sea elephants,
nor the loud whoops or paired call-songs of the inland swamp apes,
just ongoing quiet baby babbling and mothers humming melodies at the surface,
and non-vocalized staccato rhythmic clicking invisible yet audible from beneath,
alternating and complementing each other, the couple's chorus of the seashore,
with the simple message, "I am here, I hear you, you are there, I'll see you soon".
with nothing but deep & clear, sky-blue waters as the superb conductor,
and colorful fish & corals, jellyfish and urchins the distinguished audience,
and dolphins, dugongs, sharks and sea turtles the occasional stagehands,
Operettas performed repeatedly, daily feasts for more than a million years,
we come from awesome beginnings.
[inspired by HHamid]
My post at AAT on humming/sneezing/sleep apnea/prone clicking/supine humming/Nitric Oxide and suckling/etc. http://tech.groups.yahoo.com/group/AAT/message/48696
Carbon nanotubes (sponge)
and finally, pass the peanuts
"LOLrus found the bucket"
Breathing, Backfloating, Diving cycles
MV: Yes, little doubt our ancestors once regularly dived in clear sunlit sea-water, cf.studies on Moken (& later Scandinavian) children (pupil closure), this perfectly fits your photic sneeze idea.
Cheyne-Stokes respiration Pronunciation (chān stōks)
A rhythmical breathing where there is an alteration in the depth of the breaths and there are regularly occurring apneic episodes. The pattern of breathing with gradual increase in depth and sometimes in rate to a maximum, followed by a decrease resulting in apnea; the cycles ordinarily are 30 seconds to 2 minutes in duration, with 5–30 seconds of apnea; seen with bilateral deep cerebral hemispheric lesions, with metabolic encephalopathy, and, characteristically, in coma from affection of the nervous centers of respiration.
MV: Typical human Nasal Cycle suggests our ancestors dived for about 90".
Typical Sleep Apnea Rhythms in humans AFAIK seem to be a bit shorter 60".
Perhaps these 2 cycles synchronised, or perhaps they're remnants of different diving cycles (at different evolutionary periods possibly).
MV: The erectile tissue in vasomotor rhinopathy, allergic rhinitis ("hay fever"), etc.
The nasal cycle is ca.90 seconds. A periodicity of 90 seconds: for what purpose other than diving? Flaring of the nostrils is more anteriorly, at the nose entrance, not
inside the nose at the conchas, where the erectile tissue is.
MV: A lot of people suffer from nasal obstruction (by swelling of venous caverns over the inferior concha - uniquely human): can be complete, more frequent when lying down, see my paper "AAT & some common diseases". An important argument is that there's a nasal cycle in this swelling with a periodicity of c 90 seconds.
MV: Streamlining is extremely important for any actively moving (even slow-moving) animals: water is ~800 times denser than air, and ~60 times more viscous, so streamlining saves a lot of energy for the time they spent in water diving for seafoods.
MV: In Cetacea, the time needed to breathe is a few seconds or less,
DD: Yes. However, this depends on species, diving depth, diving length,
feeding behaviour, size, typical speed in water, association with other intra-specifics (competition, co-op.). There is some variability, like Homo.
MV: but our nasal cycle (about 90", Paul Van Cauwenberge) seems to suggest that our ancestors dived & floated (cf. sea otters) for about half of that time, so perhaps spouting was not necessary?
DD: Spouting depends on length of time sub-surface, not at-surface time.
I think it's likely they sneeze-spouted while surfacing from long deep
dives, whereas shallow swimming dives might have been more voluntary
blowing (seems like seals use this in shallows).
MV: The usual cycle in sleep apnea syndrome is shorter (almost a minute), so there might have been different diving customs (in different phases? or could the cycles be synchronised & used at the same time?)
DD: Perhaps different time cycles reflect different diving-depths, or
different evolutionary periods (freshwater-river vs. marine) or simply
variation due to lack of use more recently, (do vestigial organs
(tailbone-muscles, ribs, adenoids, vestigial veins) vary in shape-size
in modern Homo? I think there is much variety, considering the genetic
bottlenecks of modern HS).
DD: I currently (speculatively) view the diving-breathing cycle as a Homo aquaticus complete package, with most of the cycles in synchrony, (even possibly in synchrony with menstruation, lunar tide, sunspots, whatever).
MV: but this again suggests they stayed at the surface for almost half a minute or so.
DD: Possibly, the larger the mammal, the more explosive the exhalation? Elephants have unusual lungs, explained by their snorkel-trunk, but also possibly due to long-time submergence as well.
MV: As for the (lack of) basicranial flexion in He, if the face/nose was upwards, the body must perhaps have been vertical I'd think.
DD: What would be the largest angle they could comfortably backfloat? I drew it at 90 degrees (sea otters and modern Hs can backfloat at 90 degrees comfortably), you are suggesting 180 degrees when surfacing. Would they backfloat with eyes closed and submerged, or eyes above water? Nostrils may have remained sealed at surface (philtrum-septum valve) while mouth breathing, or alternatively, mouth closed (eating)while nostrils were open above surface.
MV: I suppose they emerged with vertical body & with the nostrils first, so I don't think they spouted in a horizontal position.
DD: Likely more forward position then, perhaps 45 degrees, (sperm whales, some balleens, sirenians?, walrus?).
MV: Did they spout through the mouth (as you drew it) or the nose or both
IYO? IYO the spouting = sneezing?
MV: Our aquarboreal theory: I tend to think early hominoids (suspension in trees) must have swum regularly [DD: face always above water, laryngeal air sacs inflated], eg, to get at the trees of other islands in the Tethys, but not that they dived a lot (although it's difficult to exclude the possibility). Wading came later IMO (early hominids, ie, even after the hominid/pongid split?). Regular diving only in Homo (although, again, earlier periods of diving can't be excluded). An external nose suggests partial aq. adapations (full aquatics have no external noses), and all apes lack this feature (I'm not sure about prenatal stages).
MV: From "The aquatic ape theory: evidence and a possible scenario" Med.Hypoth.16:17-32, 1985: "Intranasal adaptations - All aquatic mammals are able to close the nostrils, and they do so under water. Most terrestrial mammals cannot close their nostrils. Humans have rudimentary compressor and dilatator naris muscles. An even better "nose-closing-system" in our ancestors could have been the erectile tissue of the inferior nasal concha with its uniquely [not present in other mammals AFAWK, eg, not in chimps] abundant and hypersensitive plexus cavernosus. In humans, a very sudden and complete nasal obstruction can be caused by sudden changes in humidity or temperature, e.g. going into the water, or even by laying down
(vasomotor rhinopathy). Moreover, humans have a short cycle of non-alternating fluctuations in nasal resistance: the erectile tissues of the conchae involuntarily swell and shrink with a rhythm of 90 sec (23). This corresponds to the diving-rhythm of the diving women of Korea and Japan (3). In shallow-diving aquatic endotherms, the diving-and-emerging cycle is usually less than 3 min. Enhydra, for example, dives for 30 to 40 sec to catch a few mussels or sea-hedgehogs, and then emerges and floats on the surface for about the same time to crack and eat them (see Stage III)." I still think it's correct, although I would now formulate it more cautiously...
MV: It's true that salt water (eg, sterilised sea water) can well be used to clear the nasal passages (not the sinuses): salt water (more than fresh or even physiologic water?) seems to have some decongestive effect on the nasal mucosa.
DD: What is cause of vasomotor rhinopathy? bacteria, virus, genetic?
MV: Hyperactive erectile tissue on inferior concha, often elicited by laying down, or by cold & wet weather (= the reason why viral rhinitis is often called "a cold" (common cold): it resembles vasomotor rhinopathy (but has more more rhinorrhea - allergic rhinits has more sneezing & itching).
MV: The inferior concha is the lower turbinal (I think "turbinal" & "turbinate" are interchangeable): scroll-like, thin, bony processes lined throughout by mucous membrane on the lateral walls & roof of the nasal cavity, which form a labyrinth of so-called turbinals or conchae (Schultz 1969:141). Haplorhini have less turbinals than Strepsirhini, and the olfactory epithelium is withdrawn to the remotest uppermost region, eg, adult hominids-pongids only have 3 conchae (inf.=maxillo-turbinal, middle=endoturb.I, sup.=endoturb.II); gibbons & monkeys usu.still have the naso-turbinal (uppermost turbinal) = rudimentary "agger nasi" in hominids-pongids; "early in the life of man there are still as many as 5 ethmo-turbinals laid down besides the maxillo-& naso-turbinals" (7!).
DD: Does/can Vasomotor Rhinopathy occur both in sea and freshwater?
MV: It occurs on land, of course, but I don't have the impression it's more frequent when I go swimming. Everybody (incl.non-VR patients) seems to have it to some extent: it has a (uniquely human?) nasal cycle of about 90 seconds (dry apers usu.confuse this with the "long" nasal "cycle" (also in other mammals) which is perhaps fifty times longer, and not in both conchae at the same time) with which both inferior conchae synchronously swell & shrink. The only reasonable explanation I can find for such a cycle is cyclic diving, but possibly not in the latest pre-terrestrial phase (otherwise it would have been more functional in us today when we dive I'd think).
DD: Does/can VR occur both in warm (blood temp.) and cold water?
MV: Most VR patients have more problems in misty weather.
DD: Does/can VR occur both in shallow and very deep water? Does/can VR occur
both in Vt. Head up & Head down, Hz. position?
MV: Most patients have more problems at night (horizontal position, but nobody sleeps with his head down). When we lay down on our right side, it's usu.the right nasal passage that is blocked, and v.v. This happens almost immediately. It gradually worsens by abuse of nasodilator drops (Nesivin etc.).
DD: Does/can VR occur both in active swimming and inactive sinking-diving?
MV: Yes, but AFAIK there are no studies on this.
DD: [Closeable nostrils/nares prevent water from entering nasal cavities, you are saying the same applies to VR. Could water enter the paranasal sinuses or any part of the nasal cavity if the erectile tissues are fully erected?
MV: No, the nose is completely blocked, as any VR patient can tell you (it's very frequent).
DD: Do newborns/infants/children/adults all have VR capability?
MV: To some extent, probably yes. About 10-15 years ago (when I read a lot about this), one of the few groups worldwide that studied the (short) nasal cycle was that of prof. Van Cauwenberghe from Univ.Gent (now rector of the university). IIRC he told me that the cycle is more prevalent in children than in adults. Since newborns are obligate nose-breaters, I guess they don't have it (and, see Schultz above ("early in life"=?), they still have more than 3 conchae!).
DD: Are there semi-aquatic animals that use VR in diving?
MV: AFAIK, it's unuquely human. Cetacea have special pump systems that immediately block the nasal passages, but you can hardly compare these to our nasal swelling tissue.
DD: Cetaeceans inhale 3,000 times more air than Hs in 1/2 the time a Hs takes. -Humans exchange 15% of the air we breathe normally (NOT PS), Ceteaceans an exchange 85-90% of their air (How? Sneeze?) -During sneeze, how much air is exchanged? [Critical question] -The diving reflex depends on max. temp. differential, PS does not. -PS depends on max. light differential, diving reflex does not. -Speculation: Cetae (esp. large deep whales) have a
baro-sensor or temperature-sensor which triggers exhale (sneeze IMO) through
blowhole, most likely the sensor is part of the ear or eye region, though possibly part of the blowhole or echolocation equipment. -PS is semi-voluntary in Hs, often can be delayed if necessary. -PS only occurs after in-dark for about a minute.
MV: Is this so, DD?
DD: No. Not absolute, but I've read 4-5 minutes (I doubt this was timed scientifically). [The synovial fluid in finger knuckle joints can "pop", then can't be popped for about 15 minutes, this was timed scientifically.] I don't think the PS was timed this way, and from my own experience, can happen more often than 1 time in 4 minutes. My guess is that if it was done
habitually as part of a diving respiratory cycle, it would be about 1.5 to 2.5 minutes. In modern Hs, it is variable. Problem: at 200 ft down, light is 5% visible in perfect clear seawater, but if they only dived to 50ft, too much light, no PS?
MV: The best moment to sneeze would have been at the exact moment of emerging.
If surfacing-sneezing ever existed, the exact moment must have been fine-tuned by different means: sunlight ("photic") would indeed be a good indicator I'd think, but also some CNS urge to sneeze at emerging (CO2, O2?), and perhaps cutaneous sensory afferents?
DD: -Sneezing can be done vert. or horiz., probably not underwater.
MV: When a mammal starts diving (eg, to collect underwater shellfish), it has to keep the water out of its airways by all means. This can be achieved, eg, by lengthening of the airways, by narrowing them, by evolving closure possibilities... (= in parallel). We see all of this in human ancestors: external nose, longer internal airway (can be seen on transection of human & chimp nasal cavity), cavernous venous sinuses over inferior conchae, splitlike nostrils, nostril closure in young children, upper lip + philtrum to close nostrils, perhaps velum to close posterior nares. I assume that when diving becomes perfected, only one of these remains necessary.
MV: Bronchial hyper-reactivity as well as bronchial sphincters are typical of
humans (asthma) & also of, eg, seals (Elaine "Aq.ape" p.89). - allergy: Some people have stronger IgE allergic reactions than others. I don't know whether humans are generally more allergic than apes?
MV: The nose was closed: at the nostrils & at the cavernous tissue on the conchae & at the velum. The mouth could be closed at the lips & the tongue, voluntarily (BTW, this is how we voluntarily can produce consonants at free will at different places (labial, dental etc., ie, the beginning of human speech): according to suction & eating underwater. During swallowing the larynx was closed by the epiglottis. I can't see any parallelism/convergence here between dolphins & us. Cetacea have ascended larynges, the opposite of Hs. Besides, the pressure upon the glottis would have been far too high. The vocal chords (very fine & mobile structures) are for phonation, not for closing the airways underwater. This was done by the tongue & the epiglottis.
Laryngospasm is a reflex also seen in terr.mammals, to protect against food, fluids, insects... falling/flying into the airways. Of course, they closed when water came in, but not or at least not in the first place because we were semi-aquatic.
MV: - There is a so-called "long" cycle, ill-defined, about 1 to 4 hours, a general fluctuation of the nasal passages, usu.alternating right & left, not typically human. (I guess it has to do with olfaction or with cleansing of the nasal passages?)
- There is a typically-human "short" cycle of ~90 seconds, in which both nasal passages at the same time narrow by swelling of the venous plexus on the inferior nasal concha. I have no doubt this has to do with diving. At the time I corresponded with one of the investigators of this cycle,
prof. Paul van Cauwenberge (now rector of the University of Ghent), who knows what he's talking about. These swelling tissues (comparable to the corpora cavernosa in the penis) are activated by lying down, by sudden cooling & by misty weather (cf. going into the water?) - the reason why "common cold" (in fact, a viral infection by rhinoviruses of the upper airways) is often thought to be caused by "cold". People who suffer a lot from this common condition have "vasomotor rhinitis" (nasal obstruction due to swelling of the veins of the lower concha, ofter made worse by abusus of nasal vasocontrictors). It's the same swelling tissue that is often stimulated in allergic people (eg, pollen allergy).
MV: When a terrestial mammal finds more & more food underwater, it has to dip or dive for it, and therefore to close its airways underwater. Every adaptation that helps to close the airways will be advantageous during these early adaptations to food collection underwater: H as compared to P have longer airways, an external nose, the nostrils underneath the nose, an
inverted U in the nasal passage, narrower airways, swelling tissues on the inferior concha, an upper lip that can seal off the nostrils, nostril-closing muscles, etc.
MV: Interesting is that we seem to have 2 diving cycles: one at the conchae of ~90", and one during SAS (sleep apena syndrome) of ~60" or so. This seems to suggest that our diving habits showed at least 2 different phases?
ice age increases aquaticness?
Wet sinuses, VR, venal pooling at depth, bronchial closure... http://tech.groups.yahoo.com/group/AAT/message/38976
Archaic pre-heidelbergensis calvaria at Ceprano Italy
Common descent @ Dive Song
DD: Why do we sneeze, which is a complex, whole body reaction, only to remove microscopic pollen, when simply blowing the nose is more effective and more efficient? If sneezing is to remove particles, then why do people often blow their nose AFTER sneezing? And why the runny nose AFTER sneezing, if the particles are supposedly removed already? It just does not add up to natural selection for fitness.
MV: Rhinorrhea can be caused allergic reaction, viral damage &/or anti-viral reaction (rinsing away viruses/allergens)? They overlap, but generally allergy = more sneezing, VR = more obstruction, common cold (rhinoviruses) = more rhinorrhea.
Ice Age - Aquaticness effects
m3d: While back floating the face/mouth would out of the water, but the ears would be in the water, would you hear a clicking/humming sound emitted above the surface of the water?
DD: Sound moves about 1500 meters per second in seawater. Sound moves much more slowly in air, at about 340 meters per second. Note that both prone clicking at depth and supine humming at surface both produce sound underwater. Humming while exhaling sends sounds out of the nostrils or both nostrils and mouth which are above the water surface, however the sound is actually produced in the larynx at the glottal folds which is submersed, like the ears, while backfloating.
This means for example the infant nursing on the mother hears the air-born sound (laryngeal-nasal humming or laryngeal-oral song), while the partner below hears primarily the water-born laryngeal vibration of the humming but perhaps not any verbal consonants. One possible reason why humans don't have SC fat covering the throat especially around the adams apple may be because it would weaken (insulate) the hum/song/speech) sound transmission.
Submerged prone clicking, due to it's open mouth (bell jar) method, would travel directly from the air entrapped oral cavity to the water, without skin or fat to obstruct or insulate the sound. Therefore the chubby cheeks did not interfere with click sound transmissions. (That had confused me earlier, when trying to click with closed mouth.)
So apparently human ancestors at seashores used these: underwater open mouth clicking, supine humming in eupnea with nursing infant, clear vision at dark depth followed by whalespout sun sneezing, sunwarmed catnaps while backfloating in apnea.
Am J Physiol Regul Integr Comp Physiol. 2008 Nov 5.
Repetitive paired stimulation of nasotrigeminal and peripheral chemoreceptor afferents cause progressive potentiation of the diving bradycardia.
Rozloznik M, Paton JF, Dutschmann M. Neuro and Sensory Physiology, Georg-August University Goettingen, Goettingen, Germany.
The hallmarks of the mammalian diving response are protective apnea and bradycardia. These cardio-respiratory adaptations can be mimicked by stimulation the trigeminal ethmoidal nerve (EN5) and reflect oxygen conserving mechanisms during breath-hold dives. Increasing drive from peripheral chemoreceptors during sustained dives was reported to enhance the diving bradycardia. The underlying neuronal mechanisms, however, are unknown. In the present study, expression and plasticity of EN5-bradycardias after paired stimulation of the EN5 and peripheral chemoreceptors was investigated in the in situ working heart-brainstem preparation. Paired stimulations enhanced significantly the bradycardic responses compared to EN5-evoked bradycardia using sub-maximal stimulation intensity. Alternating stimulations of the EN5 followed by paired stimulation of the EN5 and chemoreceptors (10 trials, 3 min interval) caused a progressive and significant potentiation of EN5-evoked diving bradycardia. In contrast, bradycardias during paired stimulation remained unchanged during repetitive stimulation. The progressive potentiation of EN5-bradycardias was significantly enhanced after microinjection of the 5-HT3 receptor agonist (CPBG hydrochloride) into the nucleus tractus solitarii (NTS), while the 5-HT3 receptor antagonist (zacopride hydrochloride) attenuated the progressive potentiation. These results suggest an integrative function of the NTS for the multi-modal mediation of the diving response. The potentiation or 'training' of a sub-maximal diving bradycardia requires peripheral chemoreceptor drive and involves neurotransmission via 5-HT3R within the NTS. Key words: diving response, plasticity, nucleus of the solitary tract.
Electrical stimulation of the anterior ethmoidal nerve produces the diving response
Paul F. McCulloch*, Kevin M. Faber and W. Michael Panneton
Department of Anatomy and Neurobiology, Saint Louis University School of Medicine, 1402 South Grand Blvd., St. Louis, MO 63104, USA Accepted 9 March 1999.
Stimulation of the upper respiratory tract usually produces apnea, but it can also produce a vagally mediated bradycardia and a sympathetically mediated increase in peripheral vascular resistance. This cardiorespiratory response, often called the diving response, is usually initiated by nasal stimulation. The purpose of this research was to investigate the anterior ethmoidal nerve (AEN) that innervates the nasal mucosa of muskrats (Ondatra zibethicus). Electrical stimulation of the AEN (typically 50 Hz, 100 μs and 500 μA) produced immediate and sustained bradycardia and cessation of respiration similar to that of the diving response. Heart rate (HR) significantly decreased from 264±18 to 121±8 bpm, with a concurrent 4.2±0.9 s apnea, during the 5 s stimulation period. BP decreased from 97.9±4.8 to 91.2±6.4 mmHg. Using estimations from (1) cross-sectional areas of AEN trigeminal ganglion cells labeled with WGA-HRP, and (2) electron microscopic analysis of the AEN, we found that approximately 65% of the AEN is composed of unmyelinated C-fibers. In addition, 72.4% of myelinated fibers from the nerves that innervate the nasal passages were of small diameter (<6 n="1142">50 s). DMR decreased by 15%, but did not differ significantly from surface metabolic rates (MR(S)) when dive duration increased from 1 to 7 min. Overall, these data suggest that DMR is almost the same as MR(S), and that Steller sea lions incur an O(2) debt during spontaneous diving that is not repaid until the end of the dive bout. This has important consequences in differentiating between the actual and ;apparent' metabolic rate during diving, and may explain some of the differences in metabolic rates reported in pinniped species.
Respir Physiol Neurobiol. 2008 Oct 9.
Estimating the effect of lung collapse and pulmonary shunt on gas exchange during breath-hold diving: The Scholander and Kooyman legacy. Fahlman A, Hooker SK, Olszowka A, Bostrom BL, Jones DR.
Global Diving Research, Ottawa, ON, Canada K2J 5E8; Department of Zoology, The University of British Columbia, 6270 University Blvd., Vancouver, BC, Canada V6T 1Z4.
We developed a mathematical model to investigate the effect of lung compression and collapse (pulmonary shunt) on the uptake and removal of O(2), CO(2) and N(2) in blood and tissue of breath-hold diving mammals. We investigated the consequences of pressure (diving depth) and respiratory volume on pulmonary shunt and gas exchange as pressure compressed the alveoli. The model showed good agreement with previous studies of measured arterial O(2) tensions ( [Formula: see text] ) from freely diving Weddell seals and measured arterial and venous N(2) tensions from captive elephant seals compressed in a hyperbaric chamber. Pulmonary compression resulted in a rapid spike in [Formula: see text] and arterial CO(2) tension, followed by cyclical variation with a periodicity determined by Q (tot). The model showed that changes in diving lung volume are an efficient behavioural means to adjust the extent of gas exchange with depth. Differing models of lung compression and collapse depth caused major differences in blood and tissue N(2) estimates. Our integrated modelling approach contradicted predictions from simple models, and emphasised the complex nature of physiological interactions between circulation, lung compression and gas exchange. Overall, our work suggests the need for caution in interpretation of previous model results based on assumed collapse depths and all-or-nothing lung collapse models.
Cheetahs of the deep sea: deep foraging sprints in short-finned pilot whales off Tenerife (Canary Islands)
Authors: Aguilar Soto, Natacha; Johnson, Mark P.; Madsen, Peter T.; Díaz, Francisca; Domínguez, Iván; Brito, Alberto; Tyack, Peter
Source: Journal of Animal Ecology, Volume 77, Number 5, September 2008 , pp. 936-947(12) Publisher: Blackwell Publishing
Summary: Empirical testing of optimal foraging models for breath-hold divers has been difficult. Here we report data from sound and movement recording DTags placed on 23 short-finned pilot whales off Tenerife to study the foraging strategies used to catch deep-water prey. Day and night foraging dives had a maximum depth and duration of 1018 m and 21 min. Vocal behaviour during dives was consistent with biosonar-based foraging, with long series of echolocation clicks interspersed with buzzes. Similar buzzes have been associated with prey capture attempts in other echolocating species.
Foraging dives seemed to adapt to circadian rhythms. Deep dives during the day were deeper, but contained fewer buzzes (median 1), than night-time deep dives (median 5 buzzes). In most deep (540-1019 m) daytime dives with buzzes, a downward directed sprint reaching up to 9 m s−1 occurred just prior to a buzz and coincided with the deepest point in the dive, suggestive of a chase after escaping prey.
A large percentage (10-36%) of the drag-related locomotion cost of these dives (15 min long) is spent in sprinting (19-79 s). This energetic foraging tactic focused on a single or few prey items has not been observed previously in deep-diving mammals but resembles the high-risk/high-gain strategy of some terrestrial hunters such as cheetahs. Deep sprints contrast with the expectation that deep-diving mammals will swim at moderate speeds optimized to reduce oxygen consumption and maximize foraging time at depth. Pilot whales may have developed this tactic to target a deep-water niche formed by large/calorific/fast moving prey such as giant squid.
Heart rate and blood pressure time courses during prolonged dry apnoea in breath-hold divers
Authors: Perini, Renza1; Tironi, Adelaide2; Gheza, Alberto2; Butti, Ferdinando2; Moia, Christian3; Ferretti, Guido2
Source: European Journal of Applied Physiology, Volume 104, Number 1, September 2008 , pp. 1-7(7) Publisher: Springer
To define the dynamics of cardiovascular adjustments to apnoea, beat-to-beat heart rate (HR) and blood pressure and arterial oxygen saturation (SaO2) were recorded during prolonged breath-holding in air in 20 divers. Apnoea had a mean duration of 210 ± 70 s. In all subjects, HR attained a value 14 beats min−1 lower than control within the initial 30 s (phase I). HR did not change for the following 2-2.5 min (phase II). Then, nine subjects interrupted the apnoea (group A), whereas 11 subjects (group B) could prolong the breath-holding for about 100 s, during which HR continuously decreased (phase III). In both groups, mean blood pressure was 8 mmHg above control at the end of phase I; it then further increased by additional 12 mmHg at the end of the apnoea. In both groups, SaO2 did not change in the initial 100-140 s of apnoea; then, it decreased to 95% at the end of phase II. In group B, SaO2 further diminished to 84% at the end of phase III. A typical pattern of cardiovascular readjustments was identified during dry apnoea. This pattern was not compatible with a role for baroreflexes in phase I and phase II. Further readjustment in group B may imply a role for both baroreflexes and chemoreflexes. Hypothesis has been made that the end of phase II corresponds to physiological breakpoint.
Undersea Hyperb Med. 2008 May-Jun;35(3):163-7.
Barotraumatic orbital emphysema of rhinogenic origin in a breath-hold diver: a case report. Bolognini A, Delehaye E, Cau M, Cosso L. Sardinian Institute of Hyperbaric and Subaquatic Medicine, Sassari, Italy.
Orbital emphysema is a well-recognized complication of fractures involving the orbit. Commonly, it occurs when high pressure develops in nasal cavity as during nose blowing, coughing or Valsalva's maneuver and usually occurs in the subcutaneous tissues. We report the case of a young breath-hold diver who developed spontaneous, non compressive orbital emphysema during underwater fishing, with a maximal depth of 25-30 meters in the Sardinian sea. He was otherwise healthy, without previous cranio-facial trauma and nasosinusal diseases or surgery were not present in the history. When he was referred to our attention the patient presented right eyelid ptosis but diplopia and vision impairment were absent. Computer tomography scans showed subcutaneous air in the right upper eyelid and around the eyeball, particularly near the orbit's roof but optic nerve area, intraconal, was free of air. A dehiscence in lamina papyracea was evident. In our opinion, this has been the point of air entry into the orbit. A supportive therapy was advised and two weeks later the emphysema was recovered completely and the subject was symptoms free. The literature has been revised and to our knowledge no previous cases of barotraumatic orbital emphysema, in a breath-hold diver, are referred.
J Comp Physiol [B]. 2008 Nov 5.
Terrestrial apnoeas and the development of cardiac control in Australian fur seal (Arctocephalus pusillus doriferus) pups.
Deacon NL, Arnould JP. School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, VIC, 3125, Australia.
The development of cardiac control in association with terrestrial respiration patterns was examined throughout the period of maternal dependence in Australian fur seal pups. Resting eupnoic heart rate and respiration rate were significantly correlated (r (2) = 0.49) and both decreased with age (P < href="http://news.bbc.co.uk/2/hi/science/nature/7358868.stm">http://news.bbc.co.uk/2/hi/science/nature/7358868.stm
A humid corridor across the Sahara for the migration of early modern humans
out of Africa 120,000 years ago AH Osborne cs 2008 PNAS 105:16444-7
It is widely accepted that modern humans originated in sub-Saharan Africa 150-200 thousand years ago (ka), but their route of dispersal across the currently hyperarid Sahara remains controversial. Given that the first modern humans north of the Sahara are found in the Levant 120-90 ka, northward dispersal likely occurred during a humid episode in the Sahara within Marine Isotope Stage (MIS) 5e (130-117 ka). The obvious dispersal route, the Nile, may be ruled out by notable differences between archaeological finds in the Nile Valley and the Levant at the critical time. Further west, space-born radar images reveal networks of now-buried fossil river channels that extend across the desert to the Mediterranean coast, which represent alternative dispersal corridors. These corridors would explain scattered findings at desert oases of Middle Stone Age Aterian lithic industries with bifacial and tanged points that can be linked with industries further to the east and as far north as the Mediterranean coast. Here we present geochemical data that demonstrate that water in these fossil systems derived from the south during wet episodes in general, and penetrated all of the way to the Mediterranean during MIS 5e in particular. This proves the existence of an uninterrupted freshwater corridor across a currently hyperarid region of the Sahara at a key time for early modern human migrations to the north and out of Africa. http://news.bbc.co.uk/2/hi/science/nature/7668250.stm
Previous data show there was increased rainfall across the southern part of the Sahara between 130,000 and 170,000 years ago; in a gap between Ice Ages known as the last interglacial period.
Although it is unclear which routes they took to get there, Homo sapiens had reached the Levant by around 100,000 years ago, where their remains are known from Es Skhul and Qafzeh in Israel. However, this appears to have been an early, failed foray outside Africa by modern humans (??). By 75,000 years ago, Neanderthals had replaced our species in the region. Then, about 45,000 years ago, modern humans reoccupied the area. Genetic evidence suggests that populations living outside Africa today are the descendents of a migration which originated in the east of the continent between 60-70,000 years ago.Scientists have identified a major climate drought crisis that struck Africa about 70,000 years ago and which may have changed the course of human history. http://news.bbc.co.uk/2/hi/science/nature/4505516.stm
The evidence comes from sediments drilled up from the beds of Lake Malawi and Tanganyika in East Africa, and from Lake Bosumtwi in Ghana. It shows equatorial Africa experienced a prolonged period of drought.Quaternary fossil fish from the Kibish Formation, Omo Valley, Ethiopia
J Trapani 2008 JHE 55:521-530
The late Quaternary Kibish Fm preserves environments reflecting a history of fluctuations in the level of over the past 200 ky. The Kibish Fm has yielded a diverse mammalian fauna (+ birds & crocodiles), stone tools, & the oldest anatomically modern Hs. Fish, the most common vertebrate fossils in this unit, are reported in this study. Catfish (esp.clariids & Synodontis) & Nile perch Lates niloticus predominate, but the gymnarchid Gymnarchus, a cyprinid (Barbus), tigerfish (Hydrocynus) , pufferfish (Tetraodon) & other catfish are also present. In total, 9 teleost genera are found in the Kibish Fm, representing a subset of
the 37 genera that constitute the modern Omo-Turkana ichthyo-fauna. Several taxa present in the modern fauna, incl.Polypterus & members of Cichlidae, are not found in the Kibish deposits. Most spms are preserved as disarticulated or broken skeletal elements, but some preservation of articulated elements (eg, sets of vertebrae, crania with lower jaws or cleithra) also occurs. Many of the catfish and Nile perch spms are larger than the largest reported from the modern river or lake. Faunas of Kibish Members I & III closely resemble one another; the fauna from Member IV contains only the 3 most common taxa (Clarias, Synodontis, Lates), though
this may result from insufficient sampling. Barbed bone points have been collected from the upper part of the fm, indicating a long association (200ka? 40ka?) between the human inhabitants & the fish fauna of the Omo Valley.
Stewart suggests that the hominid fishers would not have needed elaborate harpoons, fishhooks or other fishing paraphernalia : hyenas, leopards, baboons & other mammals occasionally catch fish without the benefit of technology. And traditional African fishers today sometimes
scoop fish up by hand. Several common African freshwater fish are easy to catch, esp.at certain
times of year. The best catching times would have been when fish congregated to spawn in shallow water during the rainy season, and when they were stranded in pools during the dry season : fat reserves in some fish increase towards the end of the dry season, just before spawning, which makes them esp. nutritious. Only at rel. recent African sites dating up to 50 ka have fish bones been considered as evidence that fish were an important seasonal food. Fish remains have been recorded from several early hominid sites, among them E. & W.Turkana in , Senge in Zaire, in Tanzania, eg, at Olduvai Gorge, >4000 fragments of fish bone (catfish or ) were recovered from deposits ass.x H.habilis or the later H.erectus. The hominids lived close to a shallow, saline, alkaline lake.
http://www.nyu.edu/gsas/dept/anthro/disotell/vitae.html paper on mol. clock
- Homo-Pan 6.0 Ma,
- Pongo-hominines 14.0 Ma,
- hominoid/cercopithe coid 23.0 Ma.
Because a uniform mol.clock does not fit the catarrhine mtDNA data, we
estimated divergence dates using a penalized likelihood & a Bayesian method
(both take into account the effects of rate differences on lineages),
phylogenetic & multiple calibration points.
The penalized likelihood method applied to the coding regions of the mtDNA
genome yielded the following divergence date estimates:
- cercopithecine- colobine 16.2 Ma (14.4-17.9),
- colobin-presbytin, 10.9 Ma (9.6-12.3),
- cercopithecin- papionin, 11.6 Ma (10.3-12.9),
- Macaca-Papio, 9.8 Ma (8.6-10.9).
Within the hominoids :
- hylobatid-hominid 16.8 Ma (15.0-18.5),
- Gorilla-Homo+ Pan 8.1 Ma (7.1-9.0),
- Po. py. pygmaeus-Po.py. abelii 4.1 Ma (3.5-4.7),
- Pan troglodytes- paniscus 2.4 Ma (2.0-2.7).
(from plucking, nut cracking, oyster shelling, nest weaving)
from simple to complex craft
stone simple (hand axe)
pebble + chop outside -> sharp core + chips
punching maul/awl, hafted axe/adze
wood simple (dugout canoe)
hollow log + chop inside -> dugout + chips
dugout + adze -> thin side planks, lighter boat portage
strips + bundle/braid/weave -> nest, mattress
basket, basket boat, tri axial weave, knotted net
fur/skin/rawhide + deflesh/defat -> fur cape
cape + punch/sew -> leather clothes, skin boats
Stone - detach to create, attach hafting
Wood - detach to create, attach planking
Fiber - attach to create
Pelt - detach to create, attach sewing
Monday, October 20, 2008
Wednesday, October 8, 2008
The junk "Princess Taiping" arrived here in Kuala Walu Wiki (Humboldt Bay) from Taiwan yesterday, and is now sailing to San Francisco. Junk is derived from the Javanese word Jong (ship with slatted sails).
A central Vietnam Champa boat sailing and bailing
Tuesday, October 7, 2008
Symmetry, forces, scale
Simplest 3D symmetrical planar prime structure systems in universe: Tetrahedron, then octahedron & icosahedron. tetrahedra
Simplest 2D symmetrical planar structure in universe: Triangle triangles
Simplest 3D symmetrical nonplanar structure in universe: Sphere
Simplest 2D symmetrical nonplanar structure in universe: Circle
Simplest 3D nucleated vector equilibrium system: Cuboctahedron
Simplest 3D grid octet truss space frame: Isotropic Vector Matrix
Freeze Frame: Tetrahedral simplest rigid structure.
Pea & toothpick tet
Fluid Frame: Spherical simplest structure.
waterball in space
duo-tet: doubled center ~ high gravity nucleus
Jitterbug transformation from VE thru Icosa to Octa:
Click here to see jitterbug transform
(Images from Synergeo and Synergetics on the web)
Friday, October 3, 2008
Ocean less livable for marine mamals?
Red tide biotoxins from harm to medicine
Finally, an online game "saving the coral reef from an oil tanker spill", I really like the background music.
Friday, September 26, 2008
Honorable Mention, Illustration: "Visualizing the Bible"
Also see my other blog for nice pics of "the arc": http://dudescoffeeblender.blogspot.com/2008/09/arc-anciel-httpwww.html
And to cap off this post, a quote from Kelly's blog: "Okay, Patience: Across the arc of a life lived in faith, it allows the Almighty to be all-mighty." from "Flabbergasted" by Ray Blackston
[I have no idea of the context, but it's a cool quote! Cheers!]
Couple late links on Charles Darwin, Naturalist:
His tree of life: "I Think"
His faith & marriage: "I Do"
His r'evolutionary idea: "I Am"
Language and gesture: http://cas.bellarmine.edu/tietjen/Ec&Ev_Distance_learning/BehavLab/evolved_human_behaviors.htm
Tuesday, September 23, 2008
Neanderthal exploitation of marine mammals in Gibraltar
C. B. Stringer, J. C. Finlayson et al, Communicated by Erik Trinkaus, Washington University, St. Louis, MO, June 16, 2008 (received for review April 22, 2008)
Two coastal sites in Gibraltar, Vanguard and Gorham's Caves, located at Governor's Beach on the eastern side of the Rock, are especially relevant to the study of Neanderthals. Vanguard Cave provides evidence of marine food supply (mollusks, seal, dolphin, and fish). Further evidence of marine mammal remains was also found in the occupation levels at Gorham's Cave associated with Upper Paleolithic and Mousterian technologies [Finlayson C, et al. (2006) Nature 443:850–853]. The stratigraphic sequence of Gibraltar sites allows us to compare behaviors and subsistence strategies of Neanderthals during the Middle Paleolithic observed at Vanguard and Gorham's Cave sites. This evidence suggests that such use of marine resources was not a rare behavior and represents focused visits to the coast and estuaries.
Neanderthals Took Hunt for Food to the Sea
By HENRY FOUNTAIN Published: September 22, 2008
The Neanderthals were seafood lovers, new findings suggest.
Paleontologists digging in sediments at two large caves on a Gibraltar beach have found clear evidence that more than 30,000 years ago, Neanderthals ate mussels and other mollusks, fish and even marine mammals like seals and dolphins. And it was not that this bounty just fell into their lap: there are other signs that they actively hunted some of their seafood, just as they did with land animals.
Yolanda Fernández-Jalvo of the National Museum of Natural Sciences in Madrid, Christopher B. Stringer of the Natural History Museum in London and colleagues identified the remains of meals, including bones from monk seals and common and bottlenose dolphins, in Gorham’s and Vanguard caves on the eastern side of the rock. The findings are reported in The Proceedings of the National Academy of Sciences.
Some of the bones showed damage from stone tools, probably from the Neanderthals’ removing the meat from them. At Vanguard cave, the researchers found a hearth; evidence suggested it was used not for cooking but for preparing the seal and dolphin carcasses (for one thing, heating them would make the bones easier to break and the marrow easier to remove).
The location of the remains at Vanguard cave indicates that it had at least three periods of use by the Neanderthals. And many of the bones were from immature mammals, raising the possibility that the Neanderthals hunted during breeding season, when seals came on land for long periods to breed. Taken together, the evidence points to the Neanderthals’ making deliberate visits to the coast in search of delicacies from the deep.
Saturday, September 20, 2008
Great apnea diving video by "fishtaco"
monofin freediving link
“It is time for Loggers to show their stuff,” he wrote. “Go Loggers! Own the pool.”
Pool committee co-chairpersons Dennis Houghton and Brian Nunn also announced a new Web site that should be operational in about a week that will chronicle the fundraising journey, solicit support and inspire community members. At www.aquatics.myreka.org, links to “inspirations” such as the Sigrid and Harry Spath Aquatic Facility in Mendocino will be listed with the hopes of showing Eureka residents what a new community pool could look like. Still under construction, the new state-of-the-art aquatics center in Mendocino will feature an eight-lane competition lap pool, four-lane activity/therapy/learning pool with zero-depth, beach entry and play features that include a water slide and a 175-foot running-river resistance water channel — to name a few highlights.
Thursday, September 18, 2008
Captain Ahab (man) vs Moby Dick (whale) conflict resolution
Today, the battle is "crisis of the commons", where people keep dumping pollutants into the sea and overharvesting from the sea without regard for it's ecological limits. No one owns the oceans, and because they have currents moving materials around like the winds, a different type of ownership/stewardship system is required, different from land based systems, or else the oceans will be degraded.
Monday, September 15, 2008
a bit of random imagery...
see a goldfish swimming in a round pond
directionless, here and there
bounded by the water surface,
the underwater ground beneath,
and the shoreline edge where
the air, water and ground meet
add a large stone in the center of the pond
now a new boundary exists,
a stone "hole" in the pond
causing the fish to swim in circles
now the fish has purpose and direction
Human society confines individuals
into niche cubicles with social boundaries
which gives them purpose and direction
But too many stones, or too many fish
produces chaotic conflicts (traffic jam)
while too few stones or too few fish
produces aimless confusion and drifting
(inspired from 'Ode' magazine, How to move a tree)
Wednesday, September 10, 2008
Thursday, September 4, 2008
ELAINE MORGAN Qualifications: M.A.(Oxon), two University fellowships, one honorary doctorate. Author of books on human evolution including The Descent of Woman (1972), The Aquatic Ape (1982), The Scars of Evolution (1990), The Descent of the Child (1994), and The Aquatic Ape Hypothesis (1997).
Elaine's Descent of Woman is a feminist take on Darwin's Descent of Man, based on Sir Alister Hardy's Seashore Human Ancestor Hypothesis.
On Sept. 8, Greg will be attempting to break the world's speed record for 24 hr, pedal boating his Critical Power II tri-hull.
Adventures of Greg: 24 hr Human Powered Vehicle pedal boat attempt
On September 9th, 2008 Greg Kolodziejzyk set an unofficial (pending IHPVA and Guinness ratification) world record by pedaling his human powered boat 245.16 km (151.3 miles) in 24 hours on Whitefish Lake, Montana.
Wednesday, September 3, 2008
Chromera velia, a unicellular photosynthetic symbiotic brown algae found associated with coral reefs, which leaves when the reef water becomes too warm resulting in bleached coral, has been found to be related to malarial Plasmodium and other apicomplexan parasites like toxiplasmosis.
Apparently, these blood-borne parasites derive from coral cell symbiont alga, and still contain vestigial chloroplasts (chlorophyll compounds, like in tree leaves that construct tissue from hydrocarbons using sunlight energy), but now obtain energy from their animal hosts.
Now, the question remains, how did a salt-water-loving coral-symbiont-algae evolve into a freshwater-nymphal-mosquito carried vertebrate-blood parasite?
or... did it?
Saturday, August 30, 2008
mouth/larynx, is not particularly sensorial. Eating, breathing,
sniffing, sneezing are all face-sense-related, talking isn't. Talking
is all about internal air valve control.
One cannot talk underwater, yet if not for underwater air valve
control, speech would not have happened.
In a way, both speech (audio sense only) and physical gestures (visual
sense only) require an absence/reduction of other of senses, otherwise
risking interference. (Compare the small eyes of echolocating
cetaceans (especially river dolphins, which are almost blind) vs huge
eyes of ancient non-echolocating marine reptiles.)
What is the physiological opposite of the anaerobic MDR Mammalian
Divers Reflex which occurs at depth? Instant exhalation
(photic/pressure/thermal induced) & aerobic breathing at surface, with
optional controlled exhalation vocalized speech. Has anyone
immediately upon surfacing from a *long* dive, spoken during the first
exhale? I think humans are programmed/selected not to, just like
seals. First exhale, then speak/bark. Not sure though.
I think also that the LCA Hominoid/Hominid could not call while
floating vertically, possibly due to (water) pressure on the
throat/sac/hyoid/thyroid cartilage. Only when pressure was eased,
could a vocal sound be produced (compare to having a "knot in ones
throat" or feeling choked up), I guess. This allowed breathing clearly
through the nose during floating, then upon grasping and lifting up or
wading, the air sac pressure is off, and oral breathing and calling
This might have been a predecessor of being able to suction feed in
Homo underwater, having the oral breathing disconnected during
submersion, allowing the open pharynx for feeding and swallowing, then
upon re-emergence to light/pressure change, the larynx reopens to the
mouth and instantly exhales but with no vocalization, just a pure
instant complete air exchange of the lungs, trachea, mouth. Only the
little air in the nasal area is not forcibly exchanged. Why? Either
because the sinuses and eustacean tubes were pre-flooded with seawater
(per Seb Murat), or because of some other reason (high-pressure nasal
sneeze might cause damage to delicate nasal
veins/arteries/turbinates/olfactory nerves/middle ear/inner ear
Today's scuba divers and free divers instead keep their chin down near
the throat, with their eyes 60 to 90 degrees from the streamlined linear
posture (and more like a vertical floating ape posture), which differs
from this ancient diving technique, and may indicate why the photic
sneeze "doesn't work" in today's divers. DDeden
To sing, to click, to speak
Saturday, August 23, 2008
"Waterborne Civilization" Dr. R. Buckminster Fuller
...Unquestionably the great barrier reefs there break those enormous waves, and inside those lovely lagoons are full of fish and all kinds of eatables, and the very, very easy shoaling lovely sands and you could climb in and out of that as a baby practically, and on the shores coconuts falling down full of milk, and all kinds of things to eat, and no big animals to eat you so I came to the conclusion life being born naked and helpless, probably on the coral atolls, then began to have experience after experience with that water... [RBF Everything I know]
In order to realize a more sustainable way of urban development, we shall start with some understanding of local conditions of the region. S. Jumsai in his book “NAGA” argues that due to the fact that much of the research in human origins has taken place in Africa, the theory of Darwin concerning primate evolution into the human species is then usually considered to have occurred in that continent. However, in May 1979, primate fossils were discovered in the Ponduang Hills west of Mandalay, Mianmar. Dated to around forty million years and so far the oldest of their kind, the fossils immediately gave rise to speculation that primates originated instead in South-East Asia and migrated to Africa via western Asia.
According to the anthropology evidences found, little is known in the long line of primate and human evolution until a much later date. This is especially so of South-East Asia. Until now, the earliest hominid find in the South-East Asian region is the skull of a child of the Homo erectus type. It is dated between one and three million years and was found at Mojokerto in East Java. In 1941, human fossils of the type called Meganthropus were uncovered at Sangiran in Central Java and are dated a little later than the Mojokerto skull. Thus, if human and their direct ancestors have been on the planet for at least four million years, we may assume that they must have survived a number of glaciations from the close of the Tertiary period onward.
The earth has gone through several ice ages beginning with the earliest known in the pre- Cambrian period of before 600 million years ago. The cooling of the planet would cause a general southerly migration of bipeds and other animals in the northern hemisphere. Only small amount survived above the Tropic of Cancer, including some human’s forebears such as the Peking Man, Homo rheindahlensis, Neanderthal, and Cro-Magnon Man. The Pleistocene Ice Age is, however, far from being a uniform period of glaciation. Recent research points towards the existence of up to twenty secondary glaciations and a corresponding number of interglacials. With so many alterations in the Planet’s temperature, it can only be assumed that several south-to north and north-to-south migrations took place. And, the fluctuation of the water levels could cause several species to evolve.
K. Douglas addresses an interesting theory in New Scientist. She points out several researches that based on the “aquatic ape theory.” One of the researches done by A. Hardy and published in New Scientist forty years ago, suggests that a branch of the primitive ape-stock was forced by competition from “life in the trees to feed on the seashores.”
Bucky's speculation on human prehistory.
RD: signs of stone knapping and butchering in African rift 2.5 Mya, general agreement among paleoclimatologists that from ca. 5 Mya to 3 Mya there was a very warm and humid climate. By 3 Mya the Panama Isthmus was about 100 meters below the surface, until its final emergence at 2.7 Mya, there was an increasing interference with the salinity exchange between the Pacific and the Atlantic with a resulting glaciation in the northern hemisphere. The climatic consequences eventually leading to the widespread extinctions described by Elisabeth Vrba at ca. 2.7 Mya. evidence to support the conclusion that Africa was drying-out at this time, producing savanna adapted species.
PHL recent drying of Sahara:The desiccation of the Sahara Desert is also discussed
in "Climate and environmental history of the Sahara: the
last 6000 years" by Dr.Patrick Honecker at
"The results of this work document a progressive drying
of theregional terrestrial ecosystem between 5600 and
2700 years ago, in response to gradually decreasing
tropical monsoon rainfall. This drying followed a logical
ecological sequence starting with tropical grassland trees
and herbs being replaced by typical Sahel vegetation,
followed by loss of grass cover and establishment of
the modern desert plant community that is largely
restricted to oases."
Francus, P., J.-P. Cazet, M. Fagot, B. Rumes, J. M. Russell,
F. Darius, D. J. Conley, M. Schuster, H. von Suchodoletz, and
D. R. Engstrom, 2008 Climate-Driven Ecosystem Succession in
the Sahara: The Past 6000 Years. Science. vol. 320, no. 5877,
The abstract to this paper can be found at
[www.sciencemag.org] and [www.ncbi.nlm.nih.gov]
Their paleoenvironmental reconstruction of the pollen from a
continuous core covering 6000-year from northern Chad indicates
a "progressive drying of the regional terrestrial ecosystem"
that resulted in strong reductions in tropical trees and then
Sahelian grassland cover" and "large-scale dust mobilization"
starting about 4300 calendar years before the present. They
concluded that "today's desert ecosystem and regional wind
regime were established around 2700 calendar years before
A PDF file of this paper can be found at:
A discussion of this paper can be found in "Study:
Sahara Gradually Dried Up Over 6,000 Years" at:
Another recent paper about the paleoclimatology of the
Sahara Desert is;
The abstract is at [www3.interscience.wiley.com]
For the eastern Sahara, they conclude:
"The evidence derived from archaeological excavations and
surveys coupled to nearly 500 14C dates (Figure 2) suggests
that the Holocene wet phase lasted from approximately
9500–6000 B.P. (9000–5000 cal. B.C., calibration: dispersion
calibration program, Cologne 2001, www.calpal.de). After
the hyper-arid Pleistocene, the tropical summer rain front
moved about 700–1000 km northward (e.g., Haynes, 1987;
Neumann, 1989a; Pachur and Hoelzmann, 2000), which
initiated more humid conditions in the Eastern Sahara."
Notice that the Pleistocene before 9,500 BP was hyper-arid
and the "wet" Sahara was only from 9500–6000 B.P.
The abstract is at [www3.interscience.wiley.com]
"Africa During the Last 150,000 Years" by Jonathan Adams at:
"(dates in Guo et al are given in 14C years ago on the
left, approximate calibrated of 'real' dates are given
on the right)
Moist 9,500-8,200 14C ya (10,400-9,100 ya)
Slight drying 8,200-8,000 14C ya (9,100-8,900 ya)
Moist 8,000-7,000 14C ya (8,900-7,900 ya)
Moderately dry 7,000-5,700 14C ya (7,900-6,500 ya)
Moist 5,700-4,000 14C ya (6,500-4,500 ya)
Very dry - as dry as at present - 4,000-3,800 14C ya (4,500-4,100 ya)
Slightly moister than present 3,800-3,500 14C ya (4,100-3,700 ya)
After 3,500 14C ya (3,700 ya). Remaining about as dry as at present"
copied from HOM