The concept of terraforming Mars — transforming the planet's climate to support life as we know it — has long belonged to the realm of science fiction. But a new study argues that it's time to take ...

While humans living on Mars is the stuff of sci-fi movies for now, scientists may have figured out a major step toward colonization, by in effect creating global warming on the planet. It could be ...

A layer of diamonds up to 18 kilometers (11 miles) thick could be tucked below the surface of Mercury, the solar system's smallest planet and the closest to the sun, according to new research. The ...