Caltech scientists published a study using NASA Curiosity rover imagery showing the past existence of warm water on Mars.

The car-sized Curiosity rover has spotted evidence of once quite hospitable environs on Mars.

NASA's Curiosity Rover has been exploring Mars since 2012 and more recently has found evidence of ice-free ancient ponds and lakes on the surface.

New research reveals ancient ripples on Mars, providing compelling evidence of long-lost lakes that once existed 3.7 billion years ago.

NASA has found signs of a lake on Mars, with evidence suggesting the presence of water rather than just ice. Researchers discovered ripples in the sandy shores of ancient lakebeds on Mars, which were likely created by the movement of water pushed by wind.