President Donald Trump, in his first remarks as the 47th president, said he wants to send American astronauts to Mars.

The new work suggests that the edge of the dichotomy was eroded back by hundreds of kilometers during the time when an ocean might have occupied Mars' northern hemisphere. To view the Martian ...

Thousands of mounds and hills in Mars' barren northern plains are full of clay minerals, providing evidence that the rocks ...

It was a routine flight for the rotorcraft, which had proved that powered, controlled flight was possible on another planet, ...