Rather than a constant upward trajectory of evolution, it’s been billions of years of boom-and-bust cycles – first an explosion of life, and then a mass extinction of all but the most hardy hangers-on ...

A new study of ancient fossil trails pushes the origins of complex life deeper into Earth’s history, before the Cambrian Period began.

The Cambrian explosion was an extraordinary phenomenon in the evolution of life on the planet that led to the emergence of ...

In a first-of-its-kind study, Stanford researchers have measured how the abundance of ocean life has changed over the past ...