How come you feel pain when you fall and get a scrape? Tillman, age 9, Asheville, North Carolina Nobody likes to feel pain, but its something every person will experience at some point in their life.

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That's because when you stub your toe, you're actually hitting a bundle of special nerve endings called nociceptors. They all fire at once, blaring a danger signal. But some signals travel faster ...

For a person to feel pain, sensory neurons called nociceptors detect painful stimuli and then send a signal to the brain for interpretation. These painful stimuli include extreme temperatures ...

Researchers found these crabs have nociceptors, nerve endings that detect damage to the body and send a pain signal to the brain. The researchers tested 20 crabs' responses to painful stimuli ...