Why a rat's whiskers are a lot like human hands

Rats, like humans, can deduce an impressive amount of information about their physical surroundings with their sense of touch. Humans do this most effectively with their hands and fingertips, while a rat experiences a significant portion of its tactile sensation via its whiskers. What's intriguing about this parallel… » 8/17/12 9:20am 8/17/12 9:20am