Once upon a time, Earth may have sported a planetary ring of its very own. The hypothetical ring didn't last long, cosmically ...

followed by a close encounter with a large asteroid passing through the Earth's Roche limit, which then created a ring of ...

The science behind why the Earth will spin just a little bit faster on July 9, July 22, and August 5, this year.

Subduction zones, where one tectonic plate dives underneath another, drive the world’s most devastating earthquakes and tsunamis. How do these danger zones come to be? A study in Geology presents ...