Caltech

Space Scientists discover remnants of Theia, the planet that collided with Earth 4.5 billion years ago

Two vast structures near Earth’s core could preserve pieces of Theia, the lost world linked to the Moon’s formation.

Space ‘Bathtub Ring’ points to vast ancient ocean on Mars Joseph Shavit

Discoveries Caltech scientists discover a ‘spooky’ way to double the resolution of light microscopes