Trait variation is central to our understanding of species interactions, and trait variation arising within species is increasingly recognized as an important component of community ecology.

Though Charles Darwin is most famous for his voyage aboard the HMS Beagle and his theory of natural selection, the naturalist was, at heart, a botanist. Photo illustration by Smithsonian.com / Photos ...

A surprising study on the behavior of unrelated lizards in very different parts of the world has demonstrated how evolution can lead to different species learning the same skills. The study documents ...

Daphnia pulex (a.k.a. the water flea) is a microscopic crustacean whose unique reproduction habits make it the perfect species for studying evolution and natural selection. A new study looks at how ...

The Indigenous peoples of the Bolivian highlands are survivors. For thousands of years they have lived at altitudes of more than two miles, where oxygen is about 35 percent lower than at sea level.