UFO enthusiasts who rallied in 2019 to invade Area 51 may have been joking about "storming" the base. But law enforcement officials took the idea very, very seriously.
A meteorite that landed in British Columbia crashed through a roof and narrowly missed hitting a woman who was asleep in her bed at the time.
Conversational video technology enables AI-powered back-and-forth between viewers and prerecorded responses.
Hundreds of scientists with a UN panel reviewed more than 14,000 studies documenting climate change evidence, to create a new report for policymakers worldwide.
Storm formation during the 2021 Atlantic hurricane season will be higher than previously predicted, according to an update by NOAA scientists.
Billions of years ago, a slowdown in Earth's rotation period lengthened days and offered photosynthesizing bacteria the chance to release more oxygen, transforming the planet.
People have described extraterrestrial encounters that take place in a dreamlike state, and experiments suggest that such experiences may be lucid dreams.
In the chilly Arctic, a long-frozen region is a critical refuge for wildlife that depends on ice. But the so-called Last Ice Area could melt away as Earth warms.
A new survey reveals that most Americans believe in intelligent extraterrestrial life and do not feel threatened by the appearance of UFOs.
Satellite parts that melt away during reentry reduce the risk of space debris impacts on Earth, a new video demonstrates.
In a new report, Pentagon officials claim they lack evidence that UFOs are from worlds other than Earth.
U.S. lawmakers called for an official assessment of UFO sightings in December, and the six-month deadline is up.
A film frame allegedly showing the autopsy of an extraterrestrial that crash-landed in Roswell, New Mexico has an opening bid of $1 million.
A clip of a mysterious spherical object hovers over the horizon, in footage released by a filmmaker who produces UFO documentaries.
Bacterial compounds could provide antimicrobial protection in undergarments shared by astronauts during spacewalks.
Exploring volcanic lava tubes in Hawaii helps researchers understand how humans should prepare for living and working on worlds other than Earth.
Arecibo Observatory's collapse on Dec. 1, 2020 was a devastating blow for science, but its decades of observations will inform research for years to come.
Revisiting how Earth looks from space could offer scientists clues for finding alien life on distant worlds.
New images of Jupiter's polar auroras, captured by the Juno spacecraft, revealed the full cycle of intense and unusual polar light displays.
A camera on the ExoMars orbiter recently captured a photo showing a very, very tiny Perseverance on Mars.
Earth's last magnetic flip 42,000 years brought environmental change and extinctions. Could that happen now?
Spectacular space rocks from Mars and the moon could fetch hundreds of thousands of dollars at a Christie's auction.
The Doomsday Clock — a hypothetical clock that measures our nearness to utter annihilation, represented by the midnight hour — maintains last year's time.
Scientists are equipping four-legged, animal-mimicking robots with artificial intelligence (AI) and an array of sensing equipment to help the bots autonomously navigate the Red Planet.