Reptile eggs are an interesting area of study, but what makes the distinction between snakes and lizards regarding their eggs so complicated and fascinating? Both reptiles can lay eggs and even have ...

Q. I saw a photo of different kinds of bird eggs and noted not only the obvious, that smaller birds lay smaller eggs, but also that some bird eggs are elongate, whereas others are more rounded. What ...

Of all the vertebrates on Earth—that is, animals with backbones—birds are the only ones that lay colorful eggs. Scientists are still unsure why, but new research brings us a step closer to finding out ...