Scientists have unearthed the oldest fossils to date of the mysterious human lineage known as the Denisovans.
The largest-ever study of Arab genomes has revealed the most ancient of all modern Middle Eastern populations and is shedding light on how modern humans may have first expanded across the globe.
Charred seeds found in the Utah desert represent the earliest-known human use of tobacco, nearly 10,000 years earlier than previously thought, researchers said.
Fossilized human footprints found in New Mexico reveal that people dwelled in the Americas during the last ice age's peak — conclusive proof of early migration to the New World.
Astronomers may have captured the best view yet of matter colliding with the surface of a young star, findings that may shed light on what the sun looked like in its youth.
Astronomers have uncovered evidence of explosions triggered by dead stars ramming into live stars, possible proof of a new type of supernova, a new study finds.
A fizzled example of a gamma-ray burst, the most powerful kind of explosion known in the universe, suggests these outbursts can be surprisingly brief, researchers say.
Bright reflections that radar detected beneath the south pole of Mars may not be underground lakes as previously thought but deposits of clay instead, a new study finds.
In the wisp-thin sky of Jupiter's moon Ganymede, the largest satellite in the solar system, astronomers have for the first time detected evidence of water vapor, a new study finds.
Mysterious flares of X-rays from Jupiter's auroras suggest that the giant planet's "northern lights" may possess unexpected similarities with those of Earth, a new study finds.
A cluster composed of thousands of stars may dissolve to become a mob of dozens of black holes in a billion years.
Tendrils of galaxies up to hundreds of millions of light-years long may be the largest spinning objects in the universe, a new study finds.
Boulders on asteroids can be three-quarters hollow or more, a discovery that could help yield insights on the way in which Earth and other planets formed, a new study finds.
A UN report suggests that AI drones attacked human targets without any humans consulted prior to the strike.
Evidence of what may be the youngest eruption seen yet on Mars suggests the Red Planet may still be volcanically active, raising the possibility it was recently habitable.
When a white dwarf star explodes as a supernova, it may be detonating like a nuclear weapon on Earth, a new study finds.
The first known interstellar comet to visit our solar system may be the most pristine ever found, never passing near a star until visiting our own, researchers say.
What might life be like then if everyone lacked an appendix? That organ may not be a useless artifact of evolution after all.
Oceans' worth of water may remain buried in the crust of Mars, and not lost to space as previously long thought, a new study finds.
Genghis Khan may have died of bubonic plague, and not from blood loss after being castrated or other causes bandied about over the centuries, a new study finds.