Scientists have found the oldest direct evidence for tectonic motion on Earth by more than half a billion years ...

Magnetic crystals provide the earliest evidence yet of the plate tectonics that likely made Earth habitable, pushing its start back by 140 million years.

Gravitational waves are ripples in spacetime produced by violent cosmic events, such as the merging of black holes. So far, ...

Climb onto the rim and things look even weirder. You see a flat, narrow ridge with a horizon fairly close, as it curves away ...

NASA’s twin ESCAPADE spacecraft will uncover how the Sun stripped Mars of its atmosphere. Mars is a very different world ...

Even 200 years after asteroid 16 Psyche was discovered, astronomers continue to puzzle over its formation. Psyche is the 10th ...