How to tell if you're hungry

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How to tell if you're hungry

Clip from Finding Stuff Out  |  Season 2  |  Episode 5  |  Discovery Kids  |  March 5, 2015

Harrison explains Ivan Pavlov's experiment and why humans' stomachs growl when they're hungry.

Harrison explains Ivan Pavlov's experiment and why humans' stomachs growl when they're hungry.

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