In a recent episode of the PBS Digital Studios series It’s Okay To Be Smart, host Joe Hanson explains the causes of five common involuntary behaviors: yawning, hiccuping, sun sneezes, eye twitches, and sleep starts.
‘It’s Okay To Be Smart’ Volunteers to Explain the Causes of Involuntary Behaviors Like Yawns and Hiccups
Glen Tickle
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