One theory suggests that aliens are purposely leaving us be to evolve on our own.
Scientists didn't find aliens in 2017, but here's what they did find.
The SpaceX founder joked with confused Twitter users saying his Falcon 9 rocket was a nuclear alien UFO from North Korea.
Neil deGrasse Tyson doesn’t give an F about all this UFO talk.
“There’s very compelling evidence that we may not be alone, whatever that means,” Luis Elizondo said.
The former Blink-182 star is getting renewed attention after revelations of the Pentagon's UFO research program.
The Defense Department investigated reports of everything from “glowing auras” to unidentified flying objects.
He says our brains just can't handle thinking about how things work from a space-based perspective.
The Topol RS-12M can be fitted with a nuclear warhead and travel up to 6,800 miles, but it was local Russians who were most shaken by Tuesday's launch.
Government agency decides to label craft recorded in 2014 as an 'unexplained aerial phenomenon.'