Sagan's team created the greatest puzzle of all time, which you can only solve if your species understands the basic nature of the universe.

NASA's most famous astronauts secretly claimed that they encountered an alien presence on the moon and were told to keep it quiet for decades. Physicist Maaneli Derakhshani told the American Alchemy ...

A new federal release is giving the public another look at unexplained sightings. The Department of War released its third batch of declassified UFO and Unidentified Anomalous Phenomena records on ...