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.

Stock image of the moon. Our leading theory as to how the moon formed may be wrong, scientists reveal. ISTOCK / GETTY IMAGES PLUS. At the Kona Conference in Hawaii in 1984, planetary scientists ...

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.