North America

Discoveries Ancient stone tools reveal how early seafarers from Asia became America’s first people

New research shows early seafarers from Asia reached the Americas over 20,000 years ago, rewriting the story of human migration.

Green Impact North American ice sheets drove most of the sea-level rise after the last ice age Rebecca Shavit

Green Impact What killed 5 million sea stars off the coast of North America?

Green Impact What drove North America’s large mammals to extinction after the last ice age

Space Scientists discover America’s largest impact crater from 35 million years ago

Discoveries Dinosaurs roamed the northern hemisphere millions of years earlier than previously thought

Discoveries Powerful geological changes are happening beneath the United States

Discoveries Study challenges theories of earlier human arrival in Americas