UFOs

Former US Air Force Sergeant Karl Wolfe, 74, was cycling in Lansing, New York, when he was hit by a tractor trailer.

Mysterious lights were spotted in China last week, leaving onlookers to wonder what they were and some even questioned if they were from another planet.

NEW YORK — During the 1950s and 1960s, were extraterrestrials visiting the United States?

A huge haul of newfound fast radio bursts (FRBs) may help astronomers finally start to get a handle on these mysterious and powerful blasts from deep space.

While some studies claim humans are alone in the universe, a new study suggests that we have barely dipped our toes in the proverbial water when it comes to looking for intelligent life in space.

Odd-looking aircraft or lights hovering high in the sky at various times across the U.S. have prompted questions from space enthusiasts: If it's not a bird, plane or even Superman — then what is it?

Mysterious lights were spotted above Myrtle Beach, S.C. in August, raising questions what the lights were and where they originated from.

Mysterious lights were spotted above Myrtle Beach, S.C. in August, raising questions about what the lights were and where they came from.

Humans have been looking to the stars for millennia wondering if we're the only intelligent beings in the universe.

NASA is upping the search for whether we are alone in the universe, using new tools in an effort to find "technosignatures" that may emanate from advanced civilizations.