Parents were frightened by social posts that seemed to encourage violence at schools. But it was more complicated than it looked ...

Exercise normally boosts the body’s ability to use oxygen, a key marker of health and longevity — but high blood sugar can block that benefit. Researchers found that a ketogenic diet helped mice ...

Every morning, people fasten their watch, slip on a bracelet and head out the door without thinking much about what they might encounter along the way. The air they breathe, the dust on their hands ...

Evolution is perhaps the most extraordinary story ever told—a tale spanning billions of years that connects every living thing on Earth through an intricate ...