Generally, states with large populations and wide-open skies reported the highest number of UFO sightings in the U.S.

A new study showed Arizona having one of the highest amounts of UFO sightings per capita. Here are some of the states most mysterious stories.

NASA Administrator Jared Isaacman suggested sightings of unidentified anomalous phenomena might signal another 'Sputnik Moment' looming on the horizon for the United States.

A new study has linked flashes from the 1950's to potential UFO sightings after astronomers started looking through old photos and finding transients. NBC News' Gadi Schwartz talks to Astronomer Dr.

The Pentagon released a sixth batch of UFO files on Friday. The documents include a 2008 expense report detailing a nearly ...

Casino.ca ranked states most and least likely to spot an unidentified flying object based on reports to a UFO tracking site.

Tennessee radio host Mickey Utley filmed what he called an "amazing" UFO sighting from his back porch in Haywood County this ...

"Have we just been watching and kind of ignoring this or is there more?" Burlison asked.