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

The 3.7-billion-year-old formations in the planet's Gale Crater suggest the presence of long-gone bodies of liquid water, with no ice covering the surface ...

When the air rises, it cools down, and water vapor condenses into clouds ... This should not be confused with "gravitational waves," which are ripples in space-time created by extreme cosmic ...