Friday, September 26, 2008

the arc


Honorable Mention, Illustration: "Visualizing the Bible"
http://news.nationalgeographic.com/news/2008/09/photogalleries/2008-best-science-photos/photo6.html

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

Hominins ate seafood

<...and sometimes seafood ate hominins...>


http://www.slagoon.com/

http://www.nytimes.com/2008/09/23/science/23obfish.html

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)

Abstract

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.

http://tech.groups.yahoo.com/group/AAT/message/48495

Saturday, September 20, 2008

Log some Laps Locally

http://www.slagoon.com/store/book13.html

Great apnea diving video by "fishtaco"
monofin freediving link

http://www.eurekareporter.com/article/080919-%E2%80%98save-the-ehs-pool%E2%80%99-effort-unveils-web-site

‘Save the EHS pool’ effort unveils Web site


“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

Melville's classic dilemma



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.



http://www.nytimes.com/2008/09/19/science/19fish.html?partner=rssyahoo&emc=rss

Monday, September 15, 2008

"Stone Hole"


star pool

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)

Thursday, September 4, 2008

Aquatic Power Events

On Sept 7th, Elaine will be debating her Aquatic Ape Hypothesis with Anthropologist Peter Wheeler in Liverpool.

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

Coral reef bleaching & malaria


http://www.afreeman.org/2008/02/28/great-interview-week-scientific-serendipity-in-sydney-2/

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.

http://news.bbc.co.uk/2/hi/science/nature/6468381.stm

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

Dive-Surface-Sneeze-Speak ARC

Speech, though completely dependent upon the
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
can start.

[{Highly significant}]
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
barotrauma).

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

http://music000001.blogspot.com/
http://johnhawks.net/weblog/topics/language/tospeak-press-release-clarke-2009.html

Saturday, August 23, 2008

Waterborne Civilization

http://dsc.discovery.com/news/2008/08/22/earliest-human-ethiopia.html

"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.

5
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.

6
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.”

http://depts.washington.edu/agaligo/agaligo/naga/pdf/1.pdf

http://www.google.com/search?hl=en&q=site%3Abfi.org+water-people
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
[www.pressoffice.uni-koeln.de]

He states:

"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."

and

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,
pp. 765-768.

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
the present."

A PDF file of this paper can be found at:

[www.old.uni-bayreuth.de]

A discussion of this paper can be found in "Study:
Sahara Gradually Dried Up Over 6,000 Years" at:

[www.npr.org]

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:

[www.esd.ornl.gov]
[www.esd.ornl.gov]
[www.esd.ornl.gov]

"(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

Thursday, August 7, 2008

Twins



human nature & human nurture


honey_wheres_my_supersuit


Dolphin kick http://www.npr.org/templates/story/story.php?storyId=93566627

Your Inner Fish: Human anatomy article

Human anatomy is a formative experience in the training of future physicians -- it is the students' grand introduction to the body, when they memorize the names of bones, organs and nerves as they painstakingly dissect a real cadaver. That first year, as well as in years after, the medical students were curious about what kind of doctor I am. I am a fish paleontologist who studies finned creatures that have been extinct for more than 370 million years. Seeing the history inside our bodies is like peeling an onion: The first layers we see reveal the history we share with primates (large brains and opposable thumbs). Peel deeper and we find the layers of history shared with other mammals (hair and breasts), reptiles (our distinctive way of chewing food), fish (arms, legs, backbones and heads), worms (an anus on one side of the body and a mouth on the other), jellyfish (the DNA recipe that builds our bodies), sponges (our many celled bodies) and so on.Article

Thursday, July 31, 2008

Diving-Surfacing: Parallel Convergence






The blue whale's nose resembles the human nose and sea otter nose during backfloating.

Backfloating & Swimming: Infant 15 months old: Breathe on back, Swim on stomach
http://www.btaquatics.org/PPSwim.htm


The Aquaphotic Respiratory Cycle (ARC)

Explanation:

The Aquaphotic Respiratory Cycle (ARC) contains two components, relying upon the trigeminal cranial nerve:

1) submergence - Mammalian Divers Reflex (MDR) (stifled inhale)
2) emergence - Photic Sneeze (PS) (explosive exhale)

The MDR (from air surface to ~2m+ water depth) occurs when the face is
suddenly pressured, chilled and darkened which results in a inhale
reflex BUT since the face is submerged underwater, the inhaling reflex
is stifled and converted into O2 conservation or Mammalian Divers Reflex.

Human Physiology, Klinke, Silbernagel et al., 2006,
MDR: trigeminal cranial afferent nerve (V) relays the information that the
nasal and mouth cavities are submerged, which triggers the autonomus
nervous system to

* bradicardia, meaning a reduction of heart rate to about 4/5 of
normal rate
* blood "shift"(?) to the thorax to support the lung when under
pressure to keep it from collapsing (which would be bad for numerous
reasons)
* vasoconstriction, first in the limbs to protect vital organs,
and later of everything except the heart and the brain, which creates
a heart-brain circuit


The PS (from ~2m+ water depth to air surface) occurs when the face is
suddenly well lit after dark adaptation (accomodation for improved vision), (pressure and thermal changes
increase neural stimulus) -> fast forced CO2 exhale reflex and
"instant" oxygenation of tissues.

http://forums.deeperblue.com/freediving-science/79552-diving-surfacing-efficiently.html



DDeden [AAT, Deeper Blue, The ARC blog]

http://www.sciencedaily.com/videos/2006/0105-ear_popper.htm

The Ear-Popper is a handheld, battery-powered device that delivers a
constant, controlled stream of air pressure and flow into the nasal
cavity, diverting air up the Eustachian tube when the patient
swallows. This "pops" the ear so the fluid can drain, unblocking the
ear and restoring hearing.

http://en.wikipedia.org/wiki/Trigeminal_nerve
http://en.wikipedia.org/wiki/Facial_nerve
http://en.wikipedia.org/wiki/Cranial_nerves

http://scienceblogs.com/afarensis/2008/08/17/this_bloke_is_chuffed_a_book_r/

Chapter five, appropriately called "Getting Ahead", begins with Shubin
studying cranial nerves several days before an anatomy test. Most
cranial are easy because they have only one function and attach to one
muscle or organ. Four, however, are a bit more difficult to trace.
Shubin focuses on two of the four - the trigeminal and the facial.
Each breaks up into a number of smaller branches that take a complex
path through the head. The trigeminal nerves controls some of the
muscles we use for chewing, innervate teeth, control some muscles in
the inner ear, and is responsible for facial sensation. The facial
nerve controls the muscles used in making facial expressions and like
the trigeminal, it also controls some muscles in the inner ear. The
question is why? As Shubin puts it:

Nothing about them seems to make any sense. For example, both the
trigeminal and the facial nerves send tiny branches to muscles inside
our ears. Why do two different nerves, which innervate entirely
different parts of the face and jaw, send branches to ear muscles that
lie adjacent to one another? Even more confusing, the trigeminal and
facial almost crisscross as they send branches to our face and jaw. Why? To answer that we need to look at the developing embryo. Part of the answer lies in the four arches that for roughly 3-4 weeks after
conception. The first arch tissues, ultimately, form the upper and
lower jaws, the malleus and incus, and all the muscles that supply
them. The second arch forms the stapes, the hyoid and the muscles that
control facial expression. The trigeminal comes from the first arch,
while the facial nerve comes from the second. But there is more. In
sharks, the first arch forms the jaws, which are enervated by the
trigeminal. The second arch, in sharks, forms a cartilage rod that
eventually breaks up to form to bones that support the jaws. The first
bone is the equivalent to the hyoid in humans and supports the lower
jaw. The second bone, which supports the upper jaw is equivalent to
the stapes in humans. oing a step further, if we look at Amphioxus we
can see a notochord. Humans have one too, but ours breaks up early in
embryology and, according to Shubin, becime part of the intervertebral
disks. Like humans, Amphioxus also has arches. In this case, the
arches form cartilage that support the gill slits. Going back in time,
say 500 million years, we can see the notochord preserved in some of
the earliest worm fossils.

Wednesday, July 30, 2008

Chauvet cavern @ Pont d'Arc



http://www.donsmaps.com/chauvetcave.html

People have always preferred to live very near to water. This cave has paintings from 30,000 years ago. It is near this river which flows under the natural stone arc and out to the Mediterranean Sea (I guess). Now it is a gorge (steep valley) with many hiking trails.

human migration

Monday, July 28, 2008

Biggest pool



http://www.loconut.com.au/News/-27370/default.aspx?gclid=CI3G0e2n45QCFSgtagod9RcTQw

Nice place to swim, dive & backfloat, but they need a reef with pretty fish, clams, crabs, seahorses to make it interesting and more fun!

Saturday, July 12, 2008

Seashores, volcanoes & humanity

http://scienceblogs.com/highlyallochthonous/2008/07/volcanoes_our_noble_allies_in.php

http://tech.groups.yahoo.com/group/AAT/message/47171


Sedimentol.& paleogeogr.context of the Mojokerto hominin site, E.Java p.92 abstr.67th ann.meet.Soc. Vert.Paleontol. F Huffman, R Buffler, J Kappelman, D Ruez & Y Zeim 2007

... the discovery site lies above marine Mollusk Mbr II & within a fossiliferous pebbly sandstone in the upper Pucangan Fm. The sandstone is a fluvial deposit with a broad channelized base, prominent cross-bed sets & other bedding indications of mid-Channel river bars incl.preserved dune surfaces (mega-ripples) on the bars , is confortably overlain by a 4�5 m paleosol developed in a mudstone. This bed is, in turn unconformably overlain by sand+mudstone containing burrows & marine mollusks representing the basal bads of Mollusk Mbr III. These lithofacies represent a variety of deposit.environment s ranging from flood plain to delta slope , together
preserve evidence of the localized progradation of a delta lobe into a shallow water marine embayment. ... present-day deltas in this region can experience very rapid progradation rates, the Perning lobe may have been deposited in <10*4 yrs , not necessarily linked to a glacio-eustatic sea-level lowstand. Given that the Moj.hominin spm appears to have experienced min.transport, we conclude that H.erectus inhabited seacoast environment. This paleoenvironmental reonctruction is in strong contrast to the more typical savanna-woodland setting of this sp in Africa , suggest that He had a broad adaptive niche.

http://www.youtube.com/watch?v=BvrzM-BavDg&feature=dir
Where did Earth's water come from? Natl' Geographic Magazine video.

Saturday, July 5, 2008

Local - Eureka, Humboldt, California coast




Local beaches & lagoons geology/hydrology (note photos at bottom right)
http://www.northcoastjournal.com/issues/2008/07/03/lagoons-and-beaches/

Local swimming pools closing? http://www.northcoastjournal.com/issues/2008/06/19/pool-stories/

Swimming great exercise, but doesn't reduce fat, so cross-train with jogging, walking.
http://www.northcoastjournal.com/issues/2008/07/03/everybody-pool/

Eureka is 8th best town in America? (BUT water is too cold! I'd rather be tropical.)
http://ncjournal.wordpress.com/2008/06/27/eureka-declared-one-of-the-best/

Thursday, July 3, 2008

Puffins and Penguins


Puffins (left pic) live north of the equator along the coasts, they both dive and fly, and tend to walk like a duck (horiz. axis).
Penguins (right pic) live south of the equator along the coasts, they only dive, and tend to hop or walk (vertical axis) somewhat like a human. Some species of puffins & penguins may look similar due to eco-niche convergent parallels, but they are not closely related.

Penguin ice island, they flock tightly to avoid the seals, orcas and sharks of deep water.
http://simonc.f2o.org/south/archives/000145.php

Petrol penguins
http://news.yahoo.com/s/ap/20080718/ap_on_sc/brazil_dead_penguins_2

Why diving birds have small wings
http://jeb.biologists.org/cgi/content/full/207/17/i

Penguinology (Antarctica)
http://penguinology.blogspot.com/

----------------------------------------------------------------------------------------
thanks to jewel for noticing my marine mammal center 'penguin' t-shirt was actually a puffin t-shirt (my oops), got me checking out the difference between the two. But why does the marine mammal center feature birds anyways?

Saturday, June 28, 2008

Wild Wave, Los Cabos, Baja California, Mexico (click pic to enlarge)
link

Saturday, June 14, 2008

Birth of baby whale



The umbilical cord has a weak part which snaps, normally tail-first birth, the newborn rises to the surface.

Hat tip to PZ Myers at Pharyngula blog.

Friday, June 6, 2008

Polarized Vision on water surface





Glare due to light hitting water surface can be reduced by filtering through a polarized lens. Professor (Geol. ret.) Don Garlick explains this phenomenon here:
http://www.northcoastjournal.com/issues/2008/06/05/polarized/

Nature has an abundance of forms and flavors. Vision in animals may filter for color, ultra-violet, infra-red, polarized, transparency, fluorescence, rhythmic flashing, wing-eye-spots etc.