Innovation in stone tool technology involved multiple stages at the time of modern human dispersals

In a new era of astronomy, we're feeling for vibrations in space-time

What turned Earth into a giant snowball 700 million years ago? Scientists now have an answer: All-time low volcanic carbon emissions triggered a 57-million-year-long global ice age

Dark matter could be gently wobbling space-time around us — and scientists may finally know how to detect it