Our search for technosignatures—clear signs of advanced civilizations beyond Earth—takes many forms. Many are driven by the famous Drake equation, which attempts to estimate how many technological ...

Newly declassified Pentagon UFO files have reignited debate over a possible alien presence on the Moon after a previously ...

Buzz Aldrin is quoted as having made three observations, one of which was of something with a "sizeable dimension." ...

The latest batch of declassified UFO files includes audio from a previously classified NASA briefingin which a speaker ...

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

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

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 ...

NASA announced new contracts for the rovers and landers that will lay the groundwork for the agency’s proposed $30-billion Moon Base — some of which they plan to launch as soon as this fall — during a ...