Billions of years ago, so the theory goes, something around the size of Mars smacked into Earth, spewing a whole bunch of ...

A 2.35-billion-year-old meteorite with a unique chemical signature, found in Africa in 2023, plugs a major gap in our ...

Soil studied by India’s Chandrayaan-3 mission near the lunar south pole adds support to the theory that the moon once had a magma ocean billions of years ago. CNN values your feedback 1.

Rocks collected by the Chandrayaan-3 offer more clues to the moon's violent past. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about geologically active moons.