Fossils of alvarezsaurid dinosaurs show bird-like air sacs in their bones. Scans revealed hollow spaces connected to their ...

A new study found that during extreme endurance efforts like running a marathon, the brain may temporarily break down its own insulation to use as an emergency energy source.

The female sex hormone estrogen, along with progesterone, appears to underlie a fundamental difference in how males and ...

These findings mark the first time that the structural impact of weight training on the brains of people with mild dementia.