"Exceptionally preserved" fossils of an ancient shark that lived alongside the dinosaurs has finally revealed what the predator looked like — and why it may have gone extinct.

Bioluminescence traces back to the Cambrian era — 540 million years ago — and could have been used for communication, courtship and camouflage among the earliest ocean creatures.

The CDC warned doctors about "counterfeit or mishandled" Botox injections that have caused clusters of illness in the U.S.

The chest could help archaeologists understand the fire and explosion that sank the vessel.

In the early hours of Tuesday (April 23), quadruple solar flares near-simultaneously exploded from across the sun's surface, and there's a good chance that one of these outbursts launched a solar storm toward Earth.

On April 10, a bright red atmospheric "hole" was spotted in the night sky above Texas shortly after SpaceX launched 23 Starlink satellites into space. It is the latest example of an increasingly common phenomenon caused by the company's dying rockets.

NASA's Voyager 1 probe has resumed sending usable data back to Earth after engineers fixed a computer error that caused the interstellar spacecraft to only transmit gibberish for five months.

The near-Earth asteroid Kamo'oalewa, which orbits alongside our planet as a 'minimoon,' may have originated from Giordano Bruno crater on the far side of the moon, new research suggests.

A giant-hail event that hit Girona in northwest Spain in 2022 was fueled by climate change, with a marine heatwave helping to intensify the storm that killed a small child.

Researchers at MIT are using AI to train AI not to give toxic responses, using a new method that replicates human curiosity.

Enslaved people picked the cherries around 250 years ago, likely in pre-Revolutionary War times.

Researchers think a microbe that was engulfed by an algal cell 100 million years ago has since evolved into an integral part of the cell's machinery.

Antarctic sea ice has been disappearing over the last several summers. Now, climate scientists are wondering whether it will ever come back.

The fledglings are typically reared on floating platforms of sea ice, but an unprecedented decline in the ice extent has driven young onto cliffs.

In 1898, the crew of the first scientific expedition to Antarctica became trapped inside sea ice around the southernmost continent. Much of that once thick ice is dwindling, says polar researcher Edward Doddridge.

Early tests suggest that a new tool that requires only a single drop of blood could detect three of the deadliest forms of cancer.

The miniature bronze portrait depicts Alexander the Great with his wavy hair and crown of ram horns.

A new system uses generative AI to predict weather faster and more cheaply than ever — while detecting difficult-to-spot extreme weather events — beating the world's major weather agencies.

Lab research often gives one answer about whether smiling can make you feel happier, but does that translate to the real world?

Three closely grouped lakes in Ethiopia's Great Rift Valley have distinctly different hues thanks to a combination of unique features.