The curved shape of a zebrafish egg causes unequal cell divisions, creating larger cells near the animal pole and smaller cells at the margin—a size gradient that controls the timing of everything ...

One of nature's most efficient life-support systems is the egg. Eggs evolved over 300 million years ago as vertebrate animals adapted to living on land. And since then, they've taken on numerous ...

Some of life’s simplest questions get swept under the rug for a long time—after all, the most widespread phenomena often require the most data to understand. Take the shape of the boring egg, for ...

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 is ...