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 ...

NASA chief Jared Isaacman has said the US space agency holds images of objects it cannot explain, but he stopped short of calling them proof of alien life when he spoke on the Jack Gordon Podcast on ...