From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

Primitive plants could survive and the sunlight that hits them, while weaker than on Earth, is enough for photosynthesis.

A recently resurfaced image taken byNASA’s Mars Global Surveyor is reigniting public fascination with the Red Planet. The photo, which shows what appears to be a square-like formation on the Martian ...