There’s only one thing in this world shaped like an egg. Not exactly spherical, not exactly an oval, ... Conversely, birds that nest on the ground lay eggs that are less oval-shaped.

So one reason that eggs have an asymmetric tapered oval shape is that if you nudge them, they'll come back to you. They'll sweep out a circle around the pointed end, and come to a stop with the ...

The unusually long, oval egg of the Indonesian maleo may look a lot like a potato, but this bird is no slouch. When the chicks of these anvil-headed animals hatch, they're almost immediately able ...

If eggs were rectangular, they would be weak in the middle of the side walls, as well as being very uncomfortable to lay. The strongest shape of all is a ball, or sphere.

If a Hollywood exec dreamed up an egg, it would look like a chicken's: immensely popular, with an unblemished complexion. But the universe of wild bird eggs is far weirder and more diverse than ...

Eggs evolved over 300 million years ago and now come in all kinds of shapes, from Tic Tacs to teardrops to pingpong balls. After studying some 50,000 eggs, a team of researchers thinks it knows why.

The eggs of amniotes - mammals, reptiles and birds – come in a remarkable variety of shapes and sizes. Evolutionary biologists have now addressed shape variety in terrestrial vertebrates' eggs ...

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 ...