Why do we sleep? And when we sleep, why do we dream? Do our nocturnal visions serve any fundamental biological purpose? Despite the fact that we spend about a third of our lives asleep and perhaps a sixth dreaming, scientists can offer no clear answer to these questions after many decades of global research.
我們?yōu)槭裁此X?當(dāng)我們睡覺時,我們?yōu)槭裁醋鰤簦课覀兊囊归g幻像服務(wù)于任何根本的生理目的嗎?盡管我們花大約三分之一的生命時光睡覺,也許六分之一的生命時光做夢,但在經(jīng)過幾十年的全球研究后,科學(xué)家們對于這些問題仍無法給出明確的答案。
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