There might be a hidden ocean's worth of liquid water below the surface of Mars, seismic evidence suggests. According to a new paper published April 25 in the journal National Science Review, ...

For years, scientists have been intrigued by mysterious dark streaks running down the slopes of Martian cliffs and craters. These marks, called slope streaks and recurring slope lineae (RSLs), have ...

Dust storms on Mars were first observed by an astronomer using a telescope in 1796, according to NASA — and yet today, the powerful storms that can engulf the entire planet are still a mystery. To ...

Advances in technology have reopened the debate over terraforming Mars, shifting it from an impossible dream to a long-term scientific and ethical question.

Arcadia Planitia does not draw attention in the way Mars’s great canyons or volcanoes do. It sits quietly across the northern mid latitudes, flat and .