Some animals are born with horns while others shed their antlers each year. But what's the evolutionary purpose?

Tyrannosaurus rex may have taken far longer to grow up than scientists once thought. By analyzing growth rings in fossilized leg bones from 17 tyrannosaur specimens and using new statistical methods, ...

For years, we suspected that Alvarezsaurids underwent a rare process of evolutionary miniaturization directly coupled to a ...

The truth is pregnancy causes some surprising long-term changes to your body, regardless of whether you’re a celebrity or a soccer mom. And that’s not necessarily a bad thing.  Dr. Shazia Malik, a ...