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Mysterious Lights Streaking Over Las Vegas Sky Spark UFO Theories

Did NASA Cut Space Station Video Feed When UFO Was Entering Earth's Atmosphere?

New Mexico Town Still Celebrates Legendary UFO Crash Tale, 69 Years On

Mysterious Floating Black Ring Over Disneyland Explained

Alien Contact Is Still 1,500 Years Away, Cornell Researchers Say

Jupiter's Ocean Moon Europa Might Be A Good Place To Swim, But Could We Live There?

So We Discovered 3 Planets That Could Sustain Life. Now What?

Ex-NASA Astronaut Tom Jones 'Used To Be A Big UFO Fan.' Not Now.

Photographers Team Up To Explore The Modern UFO Myth

Teenage Boy Arrested Over Roswell Spaceship Theft

Finally! CIA Releases 'X-Files' Docs, Details 'How To Investigate' UFOs

'X-Files' Creator: 'I Thought The FBI Was Going To Shut Me Down'

Ancient Babylonian Cellphone Isn't Ancient, Babylonian Or A Phone

Unexplained Light Spotted In Night Sky Over California And Nevada

Dancing UFOs Hula Over Honolulu

Woman's E.T. Claim Is Extra Tenuous, Experts Say

Nick Jonas Talks About That Time He Saw Three UFOs

'UFO Clouds' Create Incredible Display Over Cape Town

No, California, That Wasn't A UFO You Saw This Weekend

UFOs, Spotted Near Delhi Airport, Puts India Military On High Alert

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OH MY GAWD! Zigzagging UFO (Or Drone) Over Long Island

Strange Fireball Explodes Over Bangkok Sky

New Hampshire Town Celebrates 1965 UFO Sighting

Tucson's UFO Mystery Revealed

Tantalizing Theory Emerges After UFO Sighting In Lightning Storm

Vatican Scientist Thinks Aliens May Exist -- But Not An Alien Jesus

Similar UFOs Appear Over Japanese, U.S. Cities

UFO Lights Up Tucson Sky Like Christmas Tree

Monstrous Controversy Rages Over Loch Ness UFO Photos

Retired Air Force Colonel Claims New Evidence Will Blow The Lid Off Rendlesham UFO Sighting

WATCH: Cloud-Like UFO Glides Through Philadelphia (Not New York)

Roswell's Unanswered UFO Questions

AMAZING PHOTOS: UFOs Spotted Above Loch Ness

Think Finding Bigfoot Is Hard? Try Finding Love

Ghost? UFO? Or Dust? Mysterious Orb Spotted At Florida Space Walk Of Fame

UFO Spotted At PGA Tournament

Why We Are Closer Than Ever To Discovering Aliens

Did A UFO 'Not Made By Man' Hover Over Chile?

Bill Nye Talks Extraterrestrial Life: 'It's Gotta Exist'

TV Station Refuses To Comment On UFO Over San Diego