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COPYRIGHT 2004 Newsweek, Inc. All rights reserved. Any reuse, distribution or alteration without express written permission of Newsweek is prohibited. For permission: www.newsweek.com
Byline: Olivia Ma
Why can't we tickle ourselves?
--Katarina Nemcokova, Banska Bystrica, Slovakia
You're right. Even with a feather, we can't crack ourselves up (trust us, we tried). Neuroscientists at University College London discovered that a part of the brain called the cerebellum differentiates between sensations we create ourselves...
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