Researchers are gaining a new appreciation for the genes on the X and Y chromosomes and how they shape sex differences in ...

PHOENIX — It seemed like a headache — nothing more. But when painkillers and a trip to an emergency room didn't fix Aaron Evans, the 14-year-old asked his father if he was going to die. "No, no," ...

Doctors are pulling out new techniques and drugs in an effort to cure devastating brain When you purchase through links on ...

Explore 25 astonishing things you can only see under a microscope. Discover hidden universes in everyday objects, from ...