A new study holds a warning for people who use a commonly prescribed sleep aid. It may set the stage for disorders like Alzheimer's.

A wireless nerve stimulator about the size of a rice grain could replace bulkier, more invasive units to treat chronic pain and neurological diseases.

The brain's way to remove waste, the glymphatic system, is synced to circadian rhythms, research in mice shows. The findings may be bad news for nappers.