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人人都会打哈欠,感觉疲劳时尤其如此。然而有关哈欠还有很多不解之谜。美国《赫芬顿邮报》近日载文,刊出你或许不知道的哈欠趣事。打哈欠不都是因为困。人们不只是疲劳的时候才会打哈欠。1986年一项小规模研究认为,打哈欠似乎与感觉无聊相关。美国《国家地理》杂志刊登一项最新研究认为,打哈欠是为了给大脑降温,以保持大脑清醒。打哈欠真的会传染。一项研究发现,观看打哈欠视频的时候,大约50%的参试
Everyone yawns, especially when feeling tired. However, there are many mysteries about yawning. The Huffington Post in the United States recently published an article that shows you something you may not know about. Not yawning because of sleepy People do not yawn when not only tired. A 1986 small study found that yawning seemed boring to feel boring. According to a recent study published by the National Geographic magazine in the United States, yawning is intended to cool the brain in order to keep the brain awake. Yawning really contagious. One study found that about 50% of the participants were watching Yawn video