Avi Loeb argued that humanity spent 70 years waiting for alien radio signals when it should have been searching its own backyard. The discovery of interstellar objects — a 2014 meteor, ‘Oumuamua, and ...

A Pentagon study released Friday that examined reported sightings of UFOs over nearly the last century found no evidence of aliens or extraterrestrial intelligence, a conclusion consistent with past U ...

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

When pilot Kenneth Arnold took off from Chehalis, Washington, in his single-engine airplane one afternoon in June 1947, he was looking for a lost military aircraft that had crashed. But what he found ...