10-22-2007, 10:34 AM
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Guest
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Origin of eyes
http://news.yahoo.com/s/livescience/...Qo7CwfHXys0NUE
http://english.people.com.cn/90001/9...8/6287064.html
Quote:
You are reading these words right now because 600 million years ago, an aquatic animal called a Hydra developed light-receptive genes—the origin of animal vision.
It wasn't exactly 20-20 vision back then though.
Hydras, a genus of freshwater animals that are kin to corals and jellyfish, measure only a few millimeters in diameter and have been around for hundreds of millions of years.
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The gaps just got a lot smaller.
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