Evolution

Bones uncovered in Arizona help fill a gap in the great amphibian backstory

On the national park's 100th anniversary, a South African–born geologist recalls his first encounter with a spectacular natural wonder

Researchers say they found evidence life began moving 2.1 billion years ago, but that contentious conclusion is far from certain

Grandmothers can enhance the survival of grandchildren. That is, unless grandma’s too old or lives too far away. Karen Hopkin reports.

An asteroid impact and volcanoes acting together could have done in the beasts, new rock dates indicate

The partial skull and additional bones represent a dinosaur species never found before

A new genetic study of Latin Americans provides evidence that gene variants for lighter skin color came about in Asia as well as in Europe. Christopher Intagliata reports.

The fossilized print, found in Gibraltar, is said to date to 28,000 years ago, which might mean it belonged to a Neandertal. But not everyone agrees with that interpretation

When our planet’s magnetosphere nearly disappeared 565 million years ago, it may have almost taken all life with it

A rare amber inclusion underscores the importance of carnivores to the fossil record

On this 210th anniversary of Darwin's birth we hear evolution writer and historian Richard Milner perform a brief monologue as Charles Darwin, and former Scientific American editor in chief John Rennie and Darwin's great-great-grandson Matthew Chapman read excerpts from The Origin of Species.

A new survey shows the number can vary considerably depending how you ask questions about evolution