Scientists propose that a moon base could act as an isolated first line of biological defense against extraterrestrial ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists have long believed Saturn’s moon Titan hid a massive underground ocean, but new research suggests something even ...

For decades, the search for life beyond Earth has focused on distant exoplanets and the rusty plains of Mars. Now, a small icy world in orbit around Saturn is emerging as one of the most compelling ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...