Twenty years ago today a magnetar’s epic tantrum made our planet ring like a bell from tens of thousands of light-years away ...

The world's oldest rocks are spread across the globe and paint a picture of Earth's turbulent early history. Here are some of ...

The astronauts on the I.S.S. — including two who were scheduled to return months ago — held a zero-gravity cookie-decorating ...

Satellites and chunks of space junk come close to colliding on a regular basis. The situation could get dangerously out of ...