Venus and Mars may have once supported life. This video explores the evidence and theories surrounding the potential for life ...

From declassified Pentagon files to NASA briefings, we trace the most talked-about UAP clips and what the sensor data actually supports. We follow cases like the MQ-9 “metallic orb,” long-duration ...

Because Titan is tidally locked, the same side of the moon faces Saturn all the time, just like our own moon and Earth. Saturn’s gravitational pull is so intense that it deforms the moon’s surface, ...

The trove contained hundreds of photographs; notable figures that appear in them include Bill Clinton, Prince Andrew, Michael ...

Guided by the sci-fi touchstones of my youth, I set off in some unexpected directions. Read beyond the breaking news.

Gil Gerard, who played television’s hunky sci-fi hero William “Buck” Rogers soon after the Star Wars franchise took hold in the late 1970s, has died. He was 82.

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

The Perseverance rover has been exploring the Jezero Crater for years, and it's finally found a potential meteorite, now ...

If aliens are out there, why haven’t we heard from them? That’s the question at the center of Pop Mech’s new story, “Aliens Probably Exist—But They’re Staying Silent For a Reason, NASA Scientist ...