Последние добавленные видео:
Why-Are-Yawns-Contagious
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13 лет назад
4773204 13 лет назад 5:45Why Is Yawning Contagious?
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11 лет назад
4530941 11 лет назад 2:31Why Do We Yawn?
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1 год назад
12670 1 год назад 1:08Why is yawning contagious? Your yawn reflex, explained. | JUST CURIOUS
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7 дней назад
599545 7 дней назад 1:17Why is yawning contagious??
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11 лет назад
2413338 11 лет назад 4:29Why is yawning contagious? - Claudia Aguirre
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5 лет назад
6321 5 лет назад 3:53WHY DO WE YAWN? | IS YAWNING CONTAGIOUS?
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3 года назад
474 3 года назад 1:19Why Are Yawns Contagious? (The Why)
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5 лет назад
2670 5 лет назад 5:07Why are yawns contagious? | Wonder Kids | Scitech WA
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3 года назад
703 3 года назад 6:13Why Is Yawning Contagious? - The Psychology of Yawning
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7 лет назад
32404 7 лет назад 3:12Why are yawns contagious? We asked a scientist
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4 года назад
202 4 года назад 5:23Why Are Yawns Contagious?
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7 лет назад
52046 7 лет назад 4:41Why Is Yawning Contagious?
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4 года назад
555 4 года назад 1:42WHY ARE YAWNS CONTAGIOUS?
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5 лет назад
63823 5 лет назад 3:35Why Do We Yawn?