More Info About Sleep

On a related note, there is an article at BBC about what sleep is with interesting info about the amount of time some animals need for sleep and the following world record:

The current world record for the longest period without sleep is 11 days, set by Randy Gardner in 1965. Four days into the research, he began hallucinating. This was followed by a delusion where he thought he was a famous footballer. Surprisingly, Randy was actually functioning quite well at the end of his research and he could still beat the scientist at pinball.