A new experiment on ultra-rare astatine could open the door to cancer treatments and new research into super-heavy atoms.
Tens of thousands of planets like Earth and Neptune might orbit the giant black hole at the center of the Milky Way.
SpaceX's Demo-2 test flight ended in the Gulf of Mexico today, about two months since its launch opened the era of commercial crewed spaceflight.
The microbes had been dormant below the ocean floor for eons, buried since the time of the dinosaurs. Then a team of scientists in Japan woke the little organisms up.
The comet NEOWISE is visible in the dawn sky right now, but photographers are facing a new challenge when they try to capture it: the SpaceX fleet of Starlink satellites.
The U.S. government says Russia tested an anti-satellite space weapon July 15. Russia says it was an inspector satellite. Nothing was destroyed.
Telescopes all over the world watched a bright flash light up space around a distant, supermassive black hole. And then, within hours, it was gone.
The United Arab Emirates' probe Hope is on its way to Mars, marking the first planetary science mission led by an Arab country. Here's why.
After the Bighorn Fire burned a large area near Pima County, Arizona, a river of dark sludge rushed toward town.
New research re-examining old data showed that 28 objects previously described as distant galaxies or dim black holes are in fact bright, shrouded supermassive black holes.
One of the most important controversies in physics remains unresolved after a major new study. But at least we have a new precise number for the universe's age.
Physicists are step closer to understanding where the largest black holes in the universe came from. But new data reveals even deeper mysteries around their creation.
Air quality could reach dangerous levels across a wide chunk of the continental U.S. and Caribbean this weekend as a rare, giant Saharan dust storm reaches the U.S.
The US Senate intelligence committee plans to impose new rules on how the Department of Defense (DOD) shares information about UFOs, and to demand a public report on what the DOD knows so far.
Most diamonds originate at the bottoms of tectonic plates. But the giant blue Hope and Cullinan diamonds may have originated far deeper within the planet.
A big black hole gobbled up a mystery object. It emitted no light detectable from Earth. What was it?
A botched restoration of a Bartolomé Esteban Murillo painting in Spain has frustrated art conservators and recalled memories of an earlier, similar mistake involving a painting of Jesus.
How fast is this nearby black hole spinning? A new measurement offers clues that could solve the old mystery.
An experiment buried underground in Italy has turned up a mysterious result, and a never-before-seen "axion" particle seems like the most likely explanation.
Once again, physicists have confirmed one of Albert Einstein's core ideas about gravity and relativity — this time with the help of a neutron star flashing across space.
Aerodynamic slats newly installed on the Golden Gate Bridge produce a loud hum on windy days, as San Fransiscans learned this past weekend.
Great white sharks are fierce hunters. But as juveniles, their diets involve way more bottom-feeding than hunting large prey.