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Why do we yawn, and is it really contagious?
Why do we yawn? Yawning is a universal gesture. Everyone yawns, from babies still in their mother's womb to the elderly. However, the exact reasons for this reflex are not well understood. Is it just ...
In today’s 3 BRILLIANT MINUTES, researchers may have found a clue. Brad Spakowitz tells you what they found happens to the ...
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