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

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

Two scientists want NASA to build a quarantine lab for alien germs on the Moon, rather than on Earth. The pair, ...

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The Pentagon has released a fresh batch of declassified UFO-related files containing decades of unexplained sightings reported by astronauts, military personnel and surveillance systems. The ...