Which line from the text shows why scientists continue to study yawning?
one thing is c...
Which line from the text shows why scientists continue to study yawning?
one thing is certain: you are probably fighting the urge to yawn right about now.
other scientists believe, however, that yawning is a form of communication.
one mystery that still remains unsolved is why we yawn—what makes us yawn and what purpose it serves.
the theory is that yawning cool the brain, allowing it to work more efficiently.
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