Geologically, Mars is very reminiscent of the moon. But it also looks a lot like the Earth. It all depends on who you ask.

Researchers have discovered two sets of ancient wave ripples on Mars, signatures of long-dried bodies of water preserved in ...

From windswept craters to frigid ice caps, explore Martian landscapes through the eyes of NASA’s orbiters, probes and rovers ...

So I grabbed my camera, ran outside, and looked up just as Mars was supposed to emerge from the Moon's curved horizon. Seen ...

Unlike the dunes on Earth which are constantly in motion, the kidney bean-shaped dunes on Mars appear surprisingly motionless ...

An exploding budget and an unraveling schedule spell disappointment for NASA's mission to learn more about Mars's history.

A switch to Mars would impact programs such as the moon-focused Space Launch System, a multibillion-dollar rocket that ...

NASA unveils a groundbreaking approach to bring Martian rock samples back to Earth by 2026, introducing competition between ...

A NASA satellite has spotted frozen "kidney beans" on Mars' sand dunes trapped in place until springtime. Photographing them ...

NASA announced Tuesday that it is exploring two options to move forward with its mission to return samples from Mars at a ...

NASA has released images of a vanishing "ghost island" in the Caspian Sea captured by its satellites. The Kumani Bank mud ...

A famous illustration of Saturn's moon Titan got it all wrong. Never mind -- what we imagine space to be, and what we know it ...