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

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.

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, ...

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.

“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.

The cells helps the snakes absorb the bones of their prey — and might show up in other animals that chomp their meals whole.

A team used generative AI to enhance T cells’ ability to fight melanoma. The immunotherapy approach needs more testing before use in cancer patients.

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

Extremely aged organs came with higher odds of disease for that organ, the team found. For example, an extremely aged heart predicted a higher risk of atrial fibrillation and heart failure, and ...