This proposes that the Moon formed during a collision between the Earth and another small planet, about the size of the planet Mars. The debris from this impact collected in an orbit around Earth to ...

Humans have asked for a long time if there is, or was, life on Mars — David Bowie perhaps most melodically. That's a major reason why we keep sending robotic rovers to the Red Planet. But a new ...

Researchers have discovered thousands of hills on Mars. These mounds contain clay minerals, indicating the planet once had water. The findings reveal that liquid water existed nearly four billion ...

A NASA study using a series of supercomputer simulations reveals a potential new solution to a longstanding Martian mystery: How did Mars ... a mix of Mars and impactor debris—to form a disk ...