“A blessing and a curse” is how Harry Aikines-Aryeetey describes the genetic quirk that means his body carries more muscle ...

Heart muscle cells grown from patient stem cells—known as human induced pluripotent stem cell–derived cardiomyocytes, or ...

A 16-year-old boy lifts a Volkswagen off his pinned neighbor. A mother fights off a polar bear to protect her children. A daughter heaves an overturned tractor from atop her father. These feats are ...