An annual report produced by the Department of Defense and the Office of the Director of National Intelligence revealed hundreds of cases of unidentified anomalous phenomena but did not attribute any of the cases to aliens.

Pentagon officials say there have been more than 20 UFO sightings in a 12-month period that need further analysis. While the majority of reports were explained away by everyday objects, some have left officials stumped. But don't get too excited - this doesn't mean an alien invasion is close by.

The Pentagon has received hundreds of reports of new UFO sightings, including “several particularly interesting cases,” according to the director of the office that investigates these reports, but reiterated it found no evidence of alien activity.