Snakes are pretty incredible animals, the poisonous ones even more so. Trace explains how snakes evolved to become venomous, and why they must keep evolving this tool to keep their deadly reputation.
via Discovery News http://news.discovery.com/animals/videos/how-snakes-got-their-venom-video.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/animals/videos/how-snakes-got-their-venom-video.htm#mkcpgn=rssnws1
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