The explosive Hunga Tonga-Hunga Ha'apai volcanic event spewed so much moisture that it increased the global average of atmospheric water vapor by 5%.
Humans are reeling under climate disruption, and there's worse to come, scientists warn in the latest UN climate assessment.
What would it take to dislodge the moon from its orbit and send it on a collision course with Earth?
Scientists just collected the first measurements of violent eruptions in extremely dense magnetic stars called magnetars.
After an asteroid struck at the end of the Cretaceous period, debris from wildfires filled the atmosphere and blocked sunlight across Earth, causing ecosystem collapse and extinctions.
Thwaites Glacier is roughly the size of Florida, and holds enough ice to raise sea levels over two feet. New research shows that the collapse of its ice shelf may be just a few years away.
A geomagnetic event around 41,000 years ago sent the aurora wandering for centuries, as far south as the equator.
Asteroid 2021 UA1, a space rock about the size of a refrigerator, made a surprise appearance when it recently flew past Earth.
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.