Is Yawning Contagious?

Name: Is Yawning Contagious?
Released: 2005-03-09
Rating: 7.7

S3 E4 March 9, 2005 ★ 7.7

Source:

Overview

Can a yawn, like a cold, truly be caught? Does toast really fall buttered-side down? Could a toy car beat a real car (in this case, a Dodge Viper) in a gravity slope race?

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