Mud never lies,” added University of Arizona archaeologist Vance Holliday, whose new work has turned a century of hypothesis ...

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.

A groundbreaking study suggests that the famous Cambrian explosion—the dramatic burst of diverse animal life—might have actually started millions of years earlier than we thought. By analyzing ancient ...