Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

Looking so far into the future is so difficult as to be a fool's errand. But it's fun!

The announcement is the latest in a stream of funding contracts NASA has awarded private companies in its effort to establish ...

An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

Researchers propose turning a future NASA moon base into a quarantine station that would screen space samples before they ever reach Earth.

There are "vast hidden magma systems" inside of Mars, scientists say – and it could have major implications for the search ...