Research based on game theory suggests if we program AI agents with a sense of guilt, they could behave more cooperatively, much like humans do.

Studies suggest that people who had seasonal flus or vaccinations have low antibody levels against H5N1 bird flu.

An infinity symbol–shaped galaxy hosts an active supermassive black hole. The growing giant may have come from the aftermath of a galactic smashup.

Seeing sick-looking faces in virtual reality triggers brain circuit changes related to threat detection and boosts activity of certain immune cells.

Drone footage from Norway shows killer whales using a highly coordinated and cooperative hunting technique to catch herring.

Dropping vaccination rates and changes in U.S. vaccine policy have public health experts concerned that annual measles outbreaks could become more frequent.

An analysis of 57 studies shows that people who walked a certain number of steps were less likely to die from any cause compared with those who walked less.

Defense lawyers have called shaken baby syndrome, or abusive head trauma, junk science. But doctors say shaking a baby is dangerous.

Earth has experienced both hot and cold periods over time, though warm times have been more common. That’s true of the last 485 million years, as seen in this timeline reported in 2024. Our genus, ...

“It feels lovely for [the] first 15 minutes, especially in winter,” Rykaczewski says. “After about two hours, it becomes [a] bit, well, sweaty.” ...

Maggots on rotting meat may have given Neandertals’ a fatty, nitrogen-rich boost, a study of their bones suggests.

Serrations at the edges of a fossilized flipper of the ancient marine reptile Temnodontosaurussuggests it may have been able to swim silently.