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Why Do We Sleep?

Here are some of the theories about why we sleep. (No one knows yet which one(s) may actually be right.)
  • Creatures may need to sleep to rest and/or re-build their bodies.
  • Creatures may need to sleep to rest and/or re-build their brains. 
  • Creatures may sleep to protect themselves at times they might accidentally get hurt (like at night).

Click the links below to learn more about theories about sleep:

http://faculty.washington.edu/chudler/sleep.html

http://www.sleepingchannel.org/SleepWorld/11212000_sleepy.shtml

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