Brain drain

The brain uses only about 15-20 watts of power -- not even enough to power a refrigerator light. But it's still something of an energy hog: less than 5% of the body's weight is brain, but it uses nearly 20% of the body's total energy. Thinking is hard work!

humans

Books

• Welcome to your brain
  why you lose your car keys but never forget how to drive and other puzzles of everyday life

Websites

• Neuroscience for kids
  Brain watts Q & A

Last updated by curious on Sept. 27, 2008

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