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

But what if the most clandestine intelligence program in U.S. history was shut down not because it failed, but because it had ...

Scientists are to send a spacecraft to hunt for aliens potentially hiding in our solar system. The European Space Agency (ESA) has announced a mission to Saturn's moon Enceladus, as it has all the ...

Saturn’s icy moon Enceladus has quietly moved from curiosity to prime suspect in the search for alien biology. A decade of ...

Decades ago, a spacecraft suggested Saturn's largest moon, Titan, had an ocean. New observations suggest that the liquid may look more like slush.