Pressure on nerves can cause the nerves to stop sending impulses to the brain, causing limbs to fall asleep. Learn more about limbs falling asleep in this HowStuffWorks podcast.
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BrainStuff Classics: What's the Controversy Behind 'Mary Had a Little Lamb'?
06:30

What Was the World's Largest Nuclear Weapon?
10:52

How Do Red-Tailed Hawks Work?
09:24