Humans need less sleep than other mammals, yet their slumber is more efficient, said researchers at Duke University in North Carolina.
In their study, the scientists researched sleep patterns of hundreds of animals. They discovered humans sleep for shorter periods of time compared to other animals.
The study also concluded that a human’s sleep is higher quality. A deeper stage of sleep, called rapid eye movement sleep, or REM, makes up 25 percent of a human’s sleep. In primates like lemurs or monkeys, REM sleep does not reach the five percent mark.
“Humans are unique in having shorter, higher quality sleep,” said David Samson, a study co-author.
Samson’s research team found that humans can prosper with an average of seven hours of sleep a day. Other primates need as many as 14 to 17 hours of sleep.
Samson said human sleep habits evolved during prehistoric times. Human ancestors moved from sleeping in trees to sleeping on the ground. Better sleeping habits resulted in better sleep in a shorter amount of time.
Homework
From VOA learning English,this is the Science Report
Humans need less sleep than other mammals（哺乳动物）.That sleep has better results, according to a new study.Researchers at Duke university put together information on the sleep habits of hundreds of mammals.Including 21 primates spices（灵长类动物）.They found that humans need less sleep than ...
Humans spend a great part of sleep in deep stages that help the brain restore itself.The study also found that a Human sleep is higher quality.A deep stage of sleep called "rapid I movement or ram" makes up 25% of a human's sleep.In primates like ...or monkeys ram sleep is less than 5%.David Simpson,the study's co-author said the shorter higher quality sleep make humans special.Simpson's research team found that humans can do well with about 7 hours of sleep a day.Other primates need as many as 14 to 17 hours of sleep.Simpson said Human sleep habits start to changing during Pre-history times.
Human ancestors move from sleeping in trees to sleeping on the ground.Sleeping habits mean better sleep in a shorter amount of time.Our ancestors slept near fire and in large groups for warm and safety.This could have allow them to get the most of their sleep in the shortest amount of the time.That left more time for other activities,like learning new skills.
The study also know that human spend about 1/3 their life spend sleeping.
For VOA learning English,I'm...
Humans need less sleep than other mammals .That sleep has better results, according to a new study.Rearchers at __ university put together information on the sleep habits of hundrends of mammals ,include 21 primate species.They found that humans need less sleep than __ _ and lemurs .Humans spent a great part of sleep in deep stages that help the brain restore itself.The study also found human sleep is higher quality.A deep stage sleep called rapid on movement or ram makes up 25% of humans sleep. In primates like __ or monkeys ram sleep is less than 5%.__ the stuy's the study's co-author said the shorter higher quality sleep make humans special.__ research team found humans can do well with about 7 hours sleep a day.other primates need as many as 14 to 17 hours sleep.__ said humans sleep habits start changing during Pre-history times.human ancesters move from sleep in trees to sleep on the ground. Better sleeping habits mean better sleep in a shorter amount of time.Our ancestors slept near fire and in large groups for warm and safety.This could have allow them to get the most of their sleep in the shortest amount of the time.That left more time for other activities,like learning new skills.The studay also know that human spent about 1/3 of life spent sleeping .
Humans need less sleep than other mammals and that sleep has better results according to new study. Researchers and do university put together information on the sleep habits of hundreds of mammals including 21 primary species . They found that humans need less sleep than xxx. Humans spent a xx part in deep stages that help brain restore itself.
The study also found human sleep is high quality. A deep stags of sleep called rapid xx makes up 25% of a humans sleep. In xx like run less of 5% . xx the study of co-author said, the shorter high quality sleep make humans special. xx researchers team found that humans can do well with about 7 hours of sleep a day, others prime need about as many as 14 to 17 hours of sleep. xx said humans sleep habits start changing during xxx times. Human ancestors move from sleeping in trees to sleeping on the ground. Better sleeping habits means better sleep in shorter amount of time. Our ancestor start ignite fire in large groups for warmth and safety . This could allow that left more time for other activities like learning new skills. The study also knows human spend about 1/3 of their life span sleeping .
Humans need less sleep than other manmals, and that sleep has better results.According to a new study,researchers at Duek University put together imformation on the sleep habits of hundreds of manmals,including 21 primate spaces.They found humans need less sleep than tranps,nicakes and lamers.Human spend a greater part of sleep in deep stages that help the brain restore itself.The study also found that human sleep is higher quality.A deep stage of sleep called rapid on movement or rem makes up 25% of humans sleep.In premates like lemers or monkeys rem sleep is less 5%.Devid Sapson the srudy's coauthor said the shorter higher quality sleep make humans special.Sapson research team found humans can do well with about 7 hours sleep per day.Other primates need as many as 14 to 17 hours of sleep.Sapson said humans sleep habits started changing during prehistory times.Human ansestors moved from sleeping in trees to sleeping on the ground.Better sleeping habits mean better sleep in the shorter amount of time.Our ansestors sleep near fire and in large groups for warmth and safety.This could have allowed them take their most of their sleep in the shortest amount of time.That left more time for other activeties like learning new skills.The study also know that human spend about 1/3 of their life spend sleeping.
Human need less sleep than other mammals, yet their slumber is more efficient said researchers at Duke University in north carolina. In their study, the scientists researched sleep patterns of hundreds of animals, they discovered human sleep for shorter period of time compared to other animals.The study also concluded that a human sleep is higher quality, a deeper staged of sleep called rapaid eye movement sleep or REM makes up 25% of a human sleep. In primates to like lemus or monkeys REM sleep does not reach the five percent mark. Humans are unique in having shorter higher quality sleep. said David, a study co-auther.
Samson's research team from that humans can prosper with an average of 7 hours of sleep a day, other primates need as many as 14 to 17 hours of sleep.
Samson said human sleep habits evolved during perhistoric times, human ancestors move from sleeping in trees to sleeping on the ground, better sleeping habits results in better sleep in a shorter amount of time.
HOMEWORK:
Humans need less sleep than other memos, Yet Slumb is more efficient that researchers at Duck university north Carilina. In there study, the scientist researched sleep of hundred animals.They discoveried humans sleep for short time compare to other animals.The study also can concluted that a human sleep is high xxx .A deep stage of sleep called repaid eimound sleep or REM make that 25 percent of human sleep. In xxx like limos or monkeys, REM sleep does not reach the 5 percent mark. "Humans are unique in having shorter higher quality sleep" said David Simpson a study xxx. Simpson's research team found that humans can prospoe with an average of 7 hours sleep a day. Other primes need as many as 14-17 hours of sleep. Simpson said human sleep habit stolen times. Human and xxx move from sleeping and trees to sleeping on the ground. Better sleeping habit result better sleep in a short and xxx time
I'm Mario Matter.
Human need less sleep than other manmuls, yet their slumber is more effcients, said reseachers at Duke Universty in Nothkilariner. In their study, the scients reseached sleep patterns of hundred animals. They discovered human sleep for short period of time compered to other anmals. The study also conluded that a human sleep is higher quality.A deep steady sleep called rapid eye movement to sleep or REM, makes up 25 percent of human's sleep, in praimet like lemursbor monkeys ,REM sleep does not reach their five percent mark." Human's aunique having shorter higher quality sleep" said Davis Andesena study colarth .Samson's reseach team found that humans can proper with averageseven hoursof sleep per day. Other perimeteneed as many as 40 to 70 hours of sleep. Samson said human sleep habit evoled during prehistory times.Human ancestors moved from sleeping in tree to sleeping on the ground. Better sleeping habit resulted in better sleep in the shorter amount of time.
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发表于 2016-1-12 09:00
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发表于 2016-1-12 13:50
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