A massive ice age wiped out ocean life 445 million years ago, reshaping ecosystems and setting the stage for jawed fish ...

Scientists have long treated mass extinctions as events locked deep in the fossil record. That framing now feels less distant ...

Warnings that humanity is heading toward its own disappearance have shifted from the fringes of science fiction into mainstream research and public debate. Instead of vague prophecies, scientists now ...

With surprising and mysterious regularity, life on Earth has flourished and vanished in cycles of mass extinction every 62 million years, say two scientists who discovered the pattern after a ...