NOVA | Mysteries of Sleep | Full Special
Virtually every animal sleeps. But why? Why do we need to spend nearly a third of our lives in such a defenseless state?
2024-12-22 12:00:00 - Nova PBS
Scientists are peering more deeply into the sleeping brain than ever before, discovering just how powerful sleep can be, playing a role in everything from memory retention and emotional regulation to removing waste from our brains. So why are we getting so little of it?