Why Don't Birds Lay Square Eggs?
Season 7 Episode 19 | 7m 22s | Video has closed captioning.
One day I saw a collection of eggs from lots of different bird species, and I realized just how many different kind of egg shapes there really are! Here’s what science says about why eggs are egg-shaped, if that's even a thing, which I’ve learned it might not be. Evolution of bird eggs, go!
Problems Playing Video? | Closed Captioning