If the surface of your skin gets too chilly, the brain sets into motion a series of warming tricks such as shivering.
Soda's effervescence comes from processes that super-saturate the liquid with carbon dioxide, which later escapes from the soft drink as tiny, effervescent bubbles.
Researchers in Laos have uncovered an ancient molar that may have belonged to a Denisovan girl who lived up to 164,000 years ago.
The first people who migrated to the Americas from Asia may have had to take a circuitous coastal route, as direct passage overland may have been blocked by a massive wall of ice.
A new analysis of a 1.5 million-year-old human vertebra found in Israel suggests that ancient human relatives dispersed out of Africa in multiple waves.
Astronomers may have for the first time detected and measured the mass of an isolated stellar-mass black hole, a new study finds.
Organic molecules in a Mars meteorite that crash-landed on Earth are not signs of life, but instead formed in chemical reactions between water and rock.
Ancient footprints reveal a mysterious relative of humans may have lived at the same time and in the same area as the famous human ancestor "Lucy" in Tanzania.
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.