Ground-penetrating radar reveals a long-lost river system hidden under the surface of Mars. (NASA/JPL/UCLA/UiO/ETH Zurich) Far away, alone in a crater on a planet inhabited only by robots, NASA's ...

NASA’s twin ESCAPADE spacecraft will uncover how the Sun stripped Mars of its atmosphere. Mars is a very different world ...

A rugged Martian landscape that resembles a vast spiderweb when seen from orbit is offering new insights into the planet’s ...

NASA's Curiosity Mars rover has spied a pitted rock face known as "Timboy Chaco" as it explores a region of the Red Planet ...

Mars didn’t always look like the barren world we see today. Over billions of years, the Sun’s solar wind stripped away much ...

A new study reveals a hidden risk for Mars missions: astronauts could lose strength even if muscle size stays the same.