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The yawn’s infectious spreadability

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Yawning is more contagious than pink eye, bird flu and “Call Me Maybe” combined. That’s science, people.

YouTuber Roman Atwood proves the yawn’s infectious spreadability with what could be the world’s most contagious prank. Atwood traveled the world, emitting giant yawns at each stop, to pull off his exhausting prank and make the stunt a global affair.