The Link Between Sleep and Deep Learning

How long can a person go without sleep? The world record is apparently 11 days. However, when Randy Gardner set that record in 1965, he may have been awake during the time, but he was basically'cognitively dysfunctional'. If perhaps Gardner went beyond two weeks he would likely have died. Some animals appear to be awake all the time. Cetaceans) need to remain awake because they need to periodically come up to the surface to breathe oxygen.