Mars

NASA's Curiosity rover has new insights into how Mars might have changed from a potentially habitable, water-rich planet to an absolutely uninhabitable desert.

Scientists know quite a bit about the surface of Mars from robotic missions, but there are still many unexplored geologic features that could tell researchers more about the solar system’s formation.

Europe's Mars Express and Trace Gas Orbiter missions captured a variety of cryptic surface features poking through melting ice across the Red Planet's south pole as spring hit the region.

In response to NASA's plea for help bringing the cost and complexity of its Mars sample-return program, Rocket Lab has won a contract to study a potential solution.

New research suggests that the atmosphere of Mars could have literally "gone to ground" as carbon dioxide was greedily slurped out of the atmosphere and locked away by Red Planet clays.

Tiny black hole "bullets" left over from the Big Bang could be passing through Mars at speeds in excess of 7,000 times the speed of sound, causing the Red Planet to "wobble."

A low-density, weak-gravity region has been found below Olympus Mons and the Tharsis volcanoes, while Mars' northern hemisphere is littered with puzzling high-gravity structures beneath the surface.

Scientists at NASA's Jet Propulsion Laboratory have recreated spider-like araneiform terrain, a geologic formation found on Mars, in a lab on Earth.

The most comprehensive map of clouds on Mars includes a variety of cloud patterns, including some that are unlike anything seen on Earth.