Neil Shubin - Great Transformations in Life: Insights from Genes & Fossils
Shubin traveled to the unforgiving environment of the Canadian Arctic to make the landmark discovery of Tiktaalik, the earliest-known limbed tetrapod fossil. But the majority of his talk focused on the more comfortable setting of the laboratory, where genetic experiments on how limbs develop in sharks and skates offer clues to human evolution.
http://pondside.uchicago.edu/oba/faculty/shubin_n.html
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