A newly identified planet candidate, HD 137010 b, looks strikingly Earth-like in size and orbit — but it may be colder than Mars due to its dimmer star. If it has a thick enough atmosphere, though, ...

The planet Mars may once have enjoyed a much milder climate, accompanied by regular and abundant rain. This long-debated hypothesis finds new support thanks to recent observations by ...

Mars's water disappeared somewhere, but scientists have been disagreeing for years about where exactly it went.

Mars, once a much wetter and more dynamic planet, is now a dry and inhospitable desert. The mystery of how the red planet ...

A northern summer dust storm on Mars boosted high-altitude water escape, suggesting short-lived events may play a bigger role ...

NASA's Viking missions to Mars may have discovered evidence for life on the Red Planet after all, according to scientists who ...

Since humans first started observing Mars, the existence of nocturnal ice clouds on the Red Planet has been known, primarily through daytime observations and sophisticated climate models. Twilight ...

NASA's Perseverance rover, launched in Florida, discovered bleached rocks on Mars, providing new evidence that the planet was ...

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

The current image of Mars as an arid and hostile desert contrasts sharply with the history revealed by its surface. Channels, ...

Scientists confirm that clocks on Mars run faster than on Earth and will change global space navigation in the future ...