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.
A fireball meteor lit up midwestern skies on Jan. 16, 2018, then landed on a frozen Michigan lake. Analysis of the space rock revealed a rich array of extraterrestrial organic compounds.
Artificial intelligence transformed NASA footage of Apollo missions to the moon, making decades-old events look like they were shot on high-definition video.
A geomagnetic storm that sparked spectacular aurora displays could also have contributed to the sinking of the Titanic.
An international contest for space photography awarded its top prize to the photographer who captured a unique view of the Andromeda galaxy.
In less than 48 hours, the last intact ice shelf in the Canadian Arctic collapsed, losing more than 40% of its mass.
A federal program for investigating UFOs was purportedly discontinued in 2012, but the Pentagon's search for UFOs never stopped. Its findings may soon be released to the public.
New images of the solar surface, the closest ever seen, included a flaw that resembled a tardigrade.
An astrophotography competition run by London's Royal Observatory Greenwich, announces a shortlist of exceptional images for its 2020 contest.
Directional changes in Earth's magnetic field happen far more rapidly than previous calculations suggested, according to new simulations.
The asteroid that sealed the dinosaurs' fate at the end of the Cretaceous struck at an angle that was the worst-case scenario for life on Earth.
Scientists have a new explanation for an explosive cosmic event in 1908 that flattened trees for hundreds of miles in a remote Siberian forest.
Stuck at home with the kids because of coronavirus? Here’s a list of educational and entertaining activities to keep them occupied.
UFO sightings during NATO war games in 1952 set the stage for the season finale of "Project Blue Book," the History channel's series about the U.S.' real-life UFO-hunting program.
Chemicals in ancient ocean rocks hint that 3.2 billion years ago, the surface of a baby Earth was continent-free and covered by a global ocean.
In low Earth orbit's growing "space junkyard," new technologies could reduce the risk of collisions.
The U.K.'s Ministry of Defense announced that it will soon release formerly classified government files about UFO encounters.
A hypothetical timepiece called the Doomsday Clock measures our nearness to Armageddon — by nuclear weapons, climate change and other global threats.
Scientists recently identified the oldest material on Earth: stardust that's 7 billion years old, tucked away in a massive, rocky meteorite that struck our planet half a century ago.
Scientists have finally pinpointed the location of a long-hidden, 790,000-year-old impact crater, found under a lava field in southern Laos.