New laboratory studies could shed light on a rock containing potential signs of alien life that’s stranded on Mars ...

For decades, the search for life on Mars has been a story of hints and maybes, of chemical curiosities that stopped just ...

For decades, the case for sending people to Mars has rested on a mix of romance, rivalry, and raw curiosity. Now a cluster of ...

A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space.