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 ...

Thousands of enigmatic hills and mounds dotting the northern plains of Mars may hold the key to understanding the planet’s ...

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 ...