Researchers discover thousands of clay-rich hills on Mars, revealing evidence of ancient water and transforming our understanding of the Red Planet's climate history.

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.

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