A very dry reading of a script accompanies an explanation of evolution. The audio resembles a lecture class so much that you might miss the ridiculous things he says. But the crudely-drawn pictures help.
So when species specialized, ducks shed everything that benefits other species except buoyancy. Maybe they didn’t realize that all birds are pretty buoyant to begin with. At least ducks are delicious. But I was a bit surprised that platypuses don’t have stomachs. I had to look that up. Therefore, you can believe that, as weird as this lecture is, the facts are all facts. I am looking forward to more from Casually Explained. -via Digg