From the 800s to the 1400s, about a dozen megadroughts struck the American Southwest, and all lasted longer than a decade.
Dead cells in the body don't sound very useful, but they might provide a new way to fight cancer, a new study in animals suggests.
Just a slight dip in the fertility rates of Neanderthals could explain their extinction over the course of several thousand years.
As if preparing for battle, some shrimplike creatures suit up in aluminum armor to survive the ravages of the deepest part of the oceans, a new study finds.
Mysterious "ghost apes" may have interbred with the great apes known as bonobos just as modern humans repeatedly had sex with now-extinct human lineages.
The event horizon is the threshold around the black hole where the escape velocity surpasses the speed of light. Here's what that means.
From a societal standpoint, you need a divine power watching you only if your neighbor isn't doing so.
A gigantic solar storm hit Earth about 2,600 years ago, one about 10 times stronger than any solar storm recorded in the modern day, a new study finds.
A distant alien world that was potentially on its way into exile in interstellar space was rescued by the gravitational pull of a passing pair of stars, a new study argues.
Analyzing ripples in the fabric of space and time created by pairs of dead stars may soon solve a cosmic mystery surrounding how quickly the universe is expanding — if scientists are lucky.
In a nearly 5,000-year-old tomb in Sweden, researchers have discovered the oldest-known strain of the notorious bacterium Yersinia pestis.
Way more sex happened between Neanderthals and the ancestors of modern humans across Europe and Asia than scientists originally thought, a new study finds.
The first mission designed to hunt a meteorite that crashed into the ocean has now discovered what may be tiny fragments of the meteorite's crust, researchers say.