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Originally Posted by octopus
I do not think this is being point of argument between scientists. It is certainly not inconsistent with fossil evidence. Many characteristics (thermoregulation, descended larynx, breath control, fat, tears, sebaceous glands, body proportions) can be decently exaplained by the hypothesis.
Still is. This is when our neural nets form most of their connections for image processing. I think I could go with explanation like this. Humans do seem to have rather powerful processing aparatus, although image quality might not be the best, as our eye cannot focus underwater (problem at sensory end).
Thanks for the article - interesting stuff.
Gypsy Secret: Children of sea see clearly underwater: Science News Online, May 17, 2003 |
I forgot to note, todays great apes have much smaller eyeballs than humans and some prehistoric hominids; some (many?) neandertals and Homo erectus had large, more bulging forward (but beneath the protruding brow ridge) and slightly more lateral eyeballs. So it is possible that our ancestors 2ma - 100ka had proportionately larger eyes compared to brain size, and as the brain enlarged the eyes didn't keep increasing, due to more and more technological activities like fine tool crafting of spears, traps, baskets, dugout boats, etc. which were done ashore and in rockshelters and quarries.
I have seen many pictures of Moken kids, but not one that wore eyeglasses.
Today however, due to politics, economics and the 12/04 tsunami, their lifestyle has been grounded and "modernized", their diving has probably become marginalized, while schooling has increased.
DDeden
