NOVA: Origins: How Life Began (50:41) - When and where did life gain a foothold on the early Earth, and how did it survive in such a hostile environment?
Tiktaalik roseae, also known as the “fishapod,” is an animal that lived about 375 million years ago, with features of fish and four-legged animals. Image courtesy of Ted Daeschler, PhD, The Academy of Natural Sciences, Philadelphia
NatGeo How to Build a Dog: Scientists have found the secret recipe behind the spectacular variety of dog shapes and sizes, and it could help unravel the complexity of human genetic disease. (Feb 2012)