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Why do we yawn?
Unexplainable
Challenging assumptions with scientific testing
Scientist Robert Provine, a renowned neuroscientist specializing in yawning, conducted an experiment to test the commonly held belief about yawning being triggered by low oxygen and high carbon dioxide levels. He challenged this assumption by manipulating the environment to contain more or less oxygen and carbon dioxide, demonstrating the importance of scientific testing in questioning long-standing ideas.
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