Scientific American.com

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

Behind the hype of GLP-1 medications lies complex science, serious side effects and a pharmaceutical arms race.

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

This newly discovered Iron Age instrument may have been played in the Celtic resistance against the Roman Empire

In the latest effort to undermine climate action, President Trump pulled the U.S. out of the U.N. Framework Convention on Climate Change, which underpins global efforts to address rising temperatures

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