Kseniia Petrova, a researcher at Harvard, has argued that she was vindictively prosecuted after her arrest in 2025.

The space agency estimates that there is a one-in-2,100 chance that debris from the Neil Gehrels Swift Observatory could injure someone on the ground.

A series of storms has added to reservoirs in the Colorado River basin, but the long-term water outlook remains bleak.

In the 2022 midterms, Democrats made global warming an issue. Things have changed.

A monthslong G.O.P. effort culminated in a scathing report about emails and other exchanges within the American Psychological Association.

Ice, experts said, can change the shape of a plane’s wing, disrupting its aerodynamics.

In one case, 75,000-year-old bones reveal what may be the earliest identifiable victim of death by wooden spear.

The feeling of existential loss was long thought to be uniquely human. But studies of coyotes, cockatoos and other creatures are prompting some scientists to reconsider.

There are more than 1.5 million known zoological species on Earth, with at least as many enigmas. Here are our top 10.

Researchers are exploring novel ways to treat, even prevent, the brain disease C.T.E. One of the most surprising: near-infrared light.

F.O.P., a rare genetic condition, causes uncontrolled explosions of bone. New drugs may slow or halt the process.

To escape predators, dwarf reed snakes trade slithering for rolling to safety.

The man who helped develop the technology for liquid crystal displays — the screens in flat-panel televisions and laptops — has died at 101.

The cartoonist Peter Kuper has filled a corridor with drawings of monarchs, depicting the beauty of the annual mass migration to Mexican forests — as well as its perils.

As many as 40 percent of injured soldiers face severe infections that can lead to amputations and death. One initiative is trying to fix that.

Experts warn that online black markets for mummified remains could pose health risks.

Countries renewed their promises to protect wildlife at U.N. talks in Armenia, but how to cover the costs remains a question.

The system that has driven life-altering discoveries and helped make the United States a superpower is now under intense strain.

From haunted zoo cages to ghostly bar owners, here are five stories from our archives that will make you shiver, or maybe chuckle.

Minerals in the space rock provide hints about the early history of the red planet, when water was flowing on the surface.