There's something mysterious in the sky. Sometimes it's a saucer-shaped object. Sometimes it's a series of lights that change in formation, color and speed. Other times someone steps forward to admit that the mystery is, well, nothing more than a hoax. One thing is certain: the phenomena of UFOs, or unidentified flying objects, will keep many with their eyes (and cameras) fixed on the skies for years to come. (Click each title to see video on mobile devices.)
Bambi Meets a UFO
A Mississippi couple's trail cameras capture eerie images involving a group of deer and floating lights.
Carolina Close Encounter?
Witnesses dismiss talk that colorful lights spotted in Carteret County, North Carolina, are a result of military aircraft exercises.
Texas City Lights
Texas officials believe a prank caused the red lights that changed formation.
UFO Spotted Over Russian Protesters
Theories include a Russian government drone or camera filming the protest.
'Sunday Night Football' Surprise
Strange lights appeared over New Orleans during the Saints-Colts football game.
Dust Storm Spins Mystery
Two strange objects spotted in a Phoenix cloud were later confirmed to be airplanes.
Big Ben Meets E.T.?
A tourist filmed this sky show that occurred above the River Thames in London.
Lake Michigan Light Show
Video shows lights hovering above one of the Great Lakes.
Windy City Witnesses UFO
A strange grouping of flashing lights in Chicago was spotted in the night sky.
UFO Sighting Spooks Colorado Town
Lafayette residents reported a strange formation of lights in the night sky.
UFO Heads for Holy City
A tourist filmed a glowing object hovering over Jerusalem's Dome of the Rock.
UFOs Hover Over NYC
NYPD switchboards lit up as strange objects were seen flying above Manhattan.
New Sighting of UFO Over China
An airport in inner Mongolia was reportedly shut down because of UFO sightings.
UFO Sighting in New York City
Three glowing objects appear to hover in the night sky over Brooklyn.
World UFO Day: Is the Truth Out There?