US officials canceled NASA’s ambitious Mars Sample Return program, leaving potential evidence of ancient life sitting on Mars. Could China beat them to it?

A new study of the oddest cloud on Mars, which reappears every year at the Arsia Mons volcano, says that "exotic physics" is required to explain its behavior.

Water ice on Mars could be a valuable resource for future explorers. ESA's Mars Express mission may have found it at the planet's equator.

Earth-like features on a distant world! Dan Smith shows how a few ripples on Mars are making waves in the geology community.

NASA's iconic Curiosity rover recently captured a striking image of dawn on Mars that shows distant cliffs in never-before-seen detail.

Learn more about the AMEC, a strange, recurring cloud on Mars that has long baffled scientists, until now.

Mars is famous for its red dust. So it’s easy to guess that the frozen water near its north pole is grimy, too.

Earth and Mars may be close neighbors today, but scientists say the two planets took different routes during their formation.

Four and a half billion years ago, Earth and Mars were born in the rotating cloud of gas and dust that would eventually become our solar system. Yet exactly how the planets formed remains one of the most disputed questions in planetary science.

Scientists have figured out where to look for signs of extraterrestrial life on the Red Planet. In the past, there was a lot of liquid water on the surface of Mars. A new study suggests that some of this water may have contained formaldehyde.