The Clean Air Act has saved millions of lives, but the EPA will stop calculating those benefits for at least some proposed regulations

Horses that were presented with cotton pads soaked in a scared human’s sweat showed more signs of fear themselves

Scientists have sequenced the genome of the long-extinct woolly rhinoceros from remains found in the stomach of a naturally mummified Pleistocene wolf pup

The U.S. space agency and the Department of Energy will work together to build a fission reactor on the lunar surface in the next four years

Mathematical tools from string theory are giving scientists a new way to study the networking of neurons

New clues hidden inside T. rex bones suggest that the carnivore lived longer lives than we thought

Robert F. Kennedy, Jr.’s Centers for Disease Control and Prevention has slashed childhood vaccine recommendations in the middle of respiratory virus season

A food scientist debunks the vilification of seed oils on social media and explains what research says about them.

Global warming surpassed 1.5 degrees Celsius for the past three years, meaning Earth is currently on track to breach the Paris climate agreement by the end of the decade

New research suggests that the x-ray light coming from the Milky Way’s central black hole Sagittarius A* has changed dramatically in the span of just a few hundred years

The skyrocketing electricity demands of AI data centers—and a cold snap—are driving up America’s emissions after years of declines, a new report finds

This reported machine may be linked to “Havana syndrome,” a debated condition characterized by a strange panoply of symptoms that were experienced by U.S. officials stationed in Cuba

Cancer survival rates climbed significantly in recent decades. But federal funding cuts could threaten that progress, physicians warn

Traditional solar fails in the windswept north. Two Swedish inventors are betting on aerodynamic resilience to solve the latitude gap

NASA astronaut and ISS leader Mike Fincke transferred station command to a Russian cosmonaut ahead of an unprecedented medical evacuation

New research links same-sex behaviors in nonhuman primates to the evolution of complex social structures

Discovered by volunteer scientists, this alien planet is out of synch with its siblings

A traditional card deck happens to dodge a tricky poker paradox. Other poker variants aren’t so lucky

Why flu cases are spiking, how AI predicts disease from your sleep, and what surprising biomechanics lie behind woodpeckers’ powerful pecks.

Four ISS crew members are set to touch down on Thursday after NASA announced the first medical evacuation in the space station’s history

Neither a square nor prime number, 2026 is still intriguing

NASA crews go through extensive training and have access to supplies to treat medical issues, from dental problems and migraines to heart attacks, while they are in orbit

At CES 2026, Stevie Wonder offered a simple test for tech. And in the smart glasses boom, the most persuasive tools aren’t about perfect sight but day-to-day independence

A new study in macaques identifies a brain circuit that acts like a “brake” on motivation

The very, very long-lived Greenland sharks were long thought to be practically blind. But a new study finds that they not only can see but also maintain their vision into old age

Total eclipses, lunar occultations, planetary conjunctions and meteor showers await stargazers this year

The world’s ocean absorbed more heat in 2025 than in any other year on record

NASA on Thursday announced it would take the extraordinary step of bringing four crewmembers back to Earth from the space station before their official mission end

A new study finds that people who quit weight-loss medications, including GLP-1 drugs, regain weight four times faster than people who stop dieting or exercising

A new study reveals that some smart dogs can learn words just by overhearing humans’ conversations

An area of high pressure is bringing record-high heat to some parts of the U.S., with an added boost from climate change

A new study suggests that primate facial expressions may not just be reflex

A giant asteroid has sent astronomers into a spin, setting a record for how fast it rotates on its axis

A wobbling jet from a giant, voracious black hole is suppressing star formation in a distant galaxy—and astronomers have never seen anything quite like it before

Sea anemones and jellyfish don’t have brains, but the way their neurons behave during sleep shows some surprising similarities to humans

NASA may bring some of the ISS’s crew home earlier than planned after one member experienced a medical issue just hours before two astronauts were due to complete a space walk outside the station on Wednesday

Users will be able to upload their health data to ChatGPT in order to get what OpenAI has described as a more personalized experience

Bigger than Hubble and launching as soon as 2029, the Lazuli Space Observatory would be the first-ever full-scale private space telescope

The use of poison on arrows marked a revolution in human hunting technology—new evidence suggests it happened tens of thousands of years earlier than previously known

Scientists have uncovered genetic evidence that they say may be linked to the Renaissance master, but some experts are more skeptical

Nutritional guidelines released on Wednesday by Secretary of Health and Human Services Robert F. Kennedy, Jr., and the USDA emphasize “real food” that is high in saturated fat, departing from decades of evidence on healthful diets

Fossils of a human ancestor from 773,000 years ago may be near the base of the Homo sapiens lineage, representing a common ancestor of modern humans, Neandertals and Denisovans

Capsizing icebergs are violently clashing with the crumbling end of the Doomsday Glacier

Water plays a crucial role in how tiny pieces of plastic enter our environment—and us

A look at how evolving national health policies could reshape the future of kids’ care, from vaccines to essential treatments.