Friday, 26 April 2013

A to Z Blogging Challenge - W is for Whales with legs

Whales have lost their hind legs (the front ones are now their flippers), and we have a pretty good fossil record of how they did so, thanks in large part to the work of Phil Gingerich (see his great whale evolutionsite here) and his collaborators.
Although whales lack external hind legs, they do have internal rudiments of the hind limbs and pelvic girdle, as seen at the top of the above image, which goes through the evolutionary process of how whales came to be. I think whales having legs is pretty much the most fool proof way of proving evolution. 
Also this, because it made me laugh

No comments:

Post a Comment