Why isn't childbirth easier? Civil engineering analysis reveals a delicate evolutionary balance at play.

Tarantulas are known around the work, but they're actually homebodies. So how did they come to inhabit six of seven continents?

New research clarifies how sauropod dinosaurs, such as Brontosaurus, Apatosaurus, and Brachiosaurus, evolved their unusual skulls.

Masses of spotted salamander eggs are either white or clear. New research indicates two dueling evolutionary forces at work.

The modern human brain is relatively young, researchers report. Their new work nails down when the brain as we know it evolved.

New research with gar fish indicates that our eye-brain connection evolved far earlier than textbooks now say.

It's surprisingly easy to turn a common type of moth larvae into a bunch of cannibals. And doing that confirms an evolutionary prediction.

A complex network of wing, muscle, and nervous system genes give fruit flies what it takes to become champion fliers.

Newly found fossils of different stages in the life cycle of the ancient lamprey may upend our ideas about the origins of vertebrates.

The closest family of the Haitian cave-rail, an extinct bird from the Caribbean, are from Africa and the South Pacific, not the Americas, a new study finds.