Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

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

A pull in the right direction ...

Mars has an active, electrically charged surface where dust storms and spinning dust devils regularly move and reshape the landscape. Mars is often portrayed as a dry, empty world, but the planet is ...

Long thought of as a dry, barren world, Mars may once have shimmered with shades of blue. A new study reveals the discovery ...

This doesn’t mean Mars causes ice ages on its own. Orbital cycles are only part of the picture. Earth’s oceans, atmosphere, ...

Researchers believe Perseverance recorded 55 instances of "mini lightning," providing the first sound evidence of Martian electrical activity. The lightning occurs during dust storms and dust devils, ...

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

Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...

NASA’s Mars Sample Return program faces opposition from planetary scientists following proposed cancellation, with concerns raised over Perseverance samples, future Mars missions, and international ...

NASA says it is “very unlikely” the agency will be able to recover a Mars spacecraft that has been out of contact for more ...

NASA's plans for Mars sample return are effectively cancelled as part of a bill approved by the U.S. Congress, ending efforts ...