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

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

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

The Mars Express orbiter launched to the Red Planet. Twenty years later, ESA has delivered a high resolution color image of ...

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 ...