Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House ...

A triangular UFO photographed over Emiliano Zapata in central Mexico has prompted multiple witness reports across nearby ...

A look at 80 years of UFO reports and the question of whether they point to coincidence or something more.

In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from ...

Vanity Fair reports from the Capitol Hill conference, where members of a sprawling community of national security experts and ...