Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

Mars is thought to currently have all the necessary ingredients for life except for perhaps the most important one: liquid water ...

By discovering carbonate rocks, NASA's Mars rovers may have unlocked the key to understanding the fate of the Red Planet's climate.

One of the great unsolved problems in modern planetary science is written on the surface of Mars. Mars has canyons that were ...