Watch live here on USATODAY.com as NASA announces the names of the astronauts selected for the Artemis III missions targeted ...

There are all sorts of things flying around the universe that we earthlings haven't yet figured out how to identify.

Only 6.6% of surveyed astrobiologists agreed that scientists had probably found extraterrestrial life on exoplanet K2-18b.

"Decades of research on invasive species have demonstrated how an organism introduced to the wrong place at the wrong time ...

Hot on the heels of the Pentagon's latest UAP releases, a Georgia Tech aerospace engineer breaks down what interstellar ...

Just because a sci-fi show was popular during its initial run doesn't mean it will last the test of time. Often, these shows ...

You sent them to that ship. I just checked the colony log. Directive dated 6/12/79, signed Burke, Carter J. You sent them out there and you didn’t even warn them. Why didn’t you warn them?” Unless you ...

Astrobiologists are raising concerns that humanity’s search for alien life may be limited by the very tools designed to find it.

NASA administrator Jared Isaacman says declassified UAP files show real unexplained phenomena but no alien bodies or crashed ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for ...

Wherever you are reading this, look around you. Every living thing you can see – other people, pets, birds flying past, trees, flowers, mushrooms, fish – is here because of unions between different ...

The Pentagon released the second tranche of declassified UFO files after US President Donald Trump ordered Defense Secretary Pete Hegseth and other agency heads to release them.