Six Reasons This Article Might Make You Yawn (Huffington Post)

Not surprisingly, studies have shown that people are likely to yawn after watching videos of others yawning. But did you know that yawning is more contagious between close friends, and can be contagious among animals too? Not only that, but a number of unique physiological changes are produced in the six seconds (on average) it takes us to yawn. Researchers are still discovering new information when it comes to this mysterious and inevitable act. The Huffington Post describes six fun phenomena they have verified so far.

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