Neil deGrasse Tyson used a Monday appearance on 'The Fox News Rundown' in the US to throw down a blunt challenge after the ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

NASA addresses the release of UFO files and discusses the ongoing search for life on Mars. What are they hiding?

Add Yahoo as a preferred source to see more of our stories on Google. NASA administrator Jared Isaacman says declassified UAP files show real unexplained phenomena but no alien bodies or crashed ships ...

The SETI Institute is the latest to confirm what scientists have long suspected: the interstellar 3I/ATLAS comet is not an alien spaceship.