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

NASA's Perseverance rover discovered rocks on Mars, providing new evidence the red planet was once a wet, habitable world ...

The discovery suggests that parts of Mars may once have supported tropical-like climates, complete with heavy, sustained rainfall.

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Curious Kids is a series for children of all ages. If you have a question you’d like ...

The new plot twist is that in order to keep enough nitrogen and phosphorus near its surface, a planet has to start out with ...

For a real 'Moon city' — meaning sustained human presence, infrastructure, and self-supporting life systems — SpaceX has a ...

Hopes that humans could live on Mars have been given a boost after scientists located an alternative water supply. It comes as plans appear to be moving forward as boffins were able to extract oxygen ...

Life on Earth may exist thanks to an incredible stroke of luck — a chemical sweet spot that most planets miss during their formation but ours managed to hit.

Possible giant "karstic" caves that formed when slightly acidic water dissolved bedrock have been identified on Mars and hailed as one of the best locations on the Red Planet to search for preserved ...

As the U.S. military eyes China, it has big plans for arms manufacturing in the Pacific — and Hawaii sits at the center of ...