Sleep

Sleep learning, the way people commonly think of it, is almost certainly impossible. But researchers are discovering types of learning that occur during sleep, with exciting applications.

"Night owls" have different patterns of brain activity compared with "morning larks," a new study finds

A new study may have uncovered why a poor night's sleep is bad for your heart and blood vessels.

There's a new way of looking at insomnia.

This bad habit could raise your risk of serious eye infections and even lead to vision loss.

How did people wake up before the invention of modern alarm clocks?

Skimping on just one night's sleep may lead to changes that could promote weight gain and muscle loss.

Doctors have a very good reason for this recommendation.

Why the "it's just one night — it'll be fine" thinking might not work for contact lenses.

Sleep deprivation could contribute to loneliness, and the feeling is "contagious," researchers say.