Humans may, one day, be able to inhabit other planets. Some advocates argue that remaining on only one courts disaster.

If scientists are able to inspect it in person, and they find that Mars was indeed once alive with microbes, we would know ...

Research shows Mars dust storms create electric discharges that drive chemical reactions, reshaping the planet's surface and ...

By Alison VerbeckMars, often depicted as a barren red planet, is far from lifeless. With its thin atmosphere and dusty surface, it is an energetic and ...

Now, a new Nature study points to an answer by catching four planets at a stage most systems never show us: The awkward, ...

The world’s oceans are becoming dangerously acidic. A controversial proposal would raise the pH — by mixing chemicals into ...