Bird eggs come in all shapes and sizes, from speckled hummingbird eggs smaller than a jellybean to mango-sized emu eggs. But how do birds make them? We asked bird expert Paul Bartell to help us find the answer.
Got a question that’s ova-whelming? Send it to us at BrainsOn.org/contact, and we’ll help crack the case!

We’re back! Brains On Universe has a new headquarters
07:30

A big update about Moment of Um and the Brains On Universe
02:56

How do braces work?
06:19