【背景】
近日,加州大學的賽格爾教授對大量的動物的睡眠時間進行研究,并發現,不同的動物所需的睡眠時間長短不一。有些動物,例如候鳥,可以堅持很長時間不睡覺。塞哥爾教授認為這說明睡眠與儲存能量相關。
【原文】
Pythons, bats and giant armadillos are among the longest sleepers at over 18 hours a day. Human babies need 16 hours, and most of us probably feel we need around eight hours sleep to function well.
Professor Jerry Seigel, from the University of California, Los Angeles, conducted a study of the sleep times of a broad range of animals, and found that they vary widely. Some, like migrating birds, can survive long periods without sleeping at all. He believes that shows sleep evolved to conserve energy:
“It's animals that are needlessly active that will not survive, but animals that are most efficient and use their waking time to do vital functions, and are otherwise asleep that will survive.”
Sleep helps make best use of limited resources. In humans, when we're awake, our brain accounts for 20 percent of the energy we use when just sitting around. Sleeping also makes us less likely to get injured and less likely to be detected by predators.
【參考翻譯】
蟒蛇,蝙蝠和犰狳是最能睡的動物,他們每天要睡18個小時左右,新生嬰兒每天需要16個小時,成人正常需要睡8個小時。
加州大學的賽格爾教授對大量的動物的睡眠時間進行研究,并發現,不同的動物所需的睡眠時間長短不一。有些動物,例如候鳥,可以堅持很長時間不睡覺。塞哥爾教授認為這說明睡眠與儲存能量相關。
過于好動的動物很難生存,相比之下,存活下來的動物必須在醒著的時候有效地運用自己的能量,在睡眠的時候好好休息。
睡眠可以幫助有效利用有限的資源。當我們醒著的時候,我們的大腦給我們提供給的能量是睡著時候的20%。睡眠也可以保護我們免于受傷或被其他動物發現。