Observations by the Mars Express orbiter reveal rapid changes on the Red Planet’s surface from windblown volcanic ash ...

So why is NASA deciding which rocket will launch a flagship European Mars mission? It’s a long story involving the search for ...

There is a lot of evidence from orbiting satellites and surface rovers indicating that liquid water was present long ago on ...

Mars may be hostile, but it might not be entirely unlivable. In lab experiments, yeast cells survived simulated Martian shock ...

The Trump administration has unveiled an ambitious new strategy to dramatically expand the use of nuclear power in space.

For several days this month, Saturn, Mars, and Mercury appear just degrees apart before sunrise—close enough to watch their ...