Humans need sleep because it is an essential process to maintain health. Sleep is necessary for cognitive functions, such as memory, emotions and learning, as well as physical func...
Industrialization and artificial light have substantially altered human sleep .....
Animals that do not need recovery sleep after staying awake longer than usual.
Dec 18, 2007 ... Still, the question remains: Why do we need sleep at all? ... for example, what
happens when humans or other animals are deprived of sleep.
Why do our bodies need sleep? ... Researchers have also shown that after
people sleep, they tend to retain ... How Much Sleep Do We Really Need?
Oct 19, 2013 ... Humans need sleep; everybody knows that without it, we get cranky, a bit ... for
our body's mental street-cleaners to come out and do their work.
May 15, 2015 ... New research is giving scientists an insight into why we sleep and what happens
... Research suggests that parts of the human brain may well be asleep when it is
sleep-deprived. .... 'Arrogance' of ignoring need for sleep.
For infants, the requirement is much higher (about 16 hours a day), and
teenagers need on average about 9 hours of sleep. As people age, they tend to
Scientists have yet to determine exactly why people sleep. However, they do
know that humans must sleep and, in fact, people can survive longer without food
What we do know is that sleep is an anabolic, or building, process. ... Human
beings can function without a full tune-up, but they will be in a state of relative
The amount of sleep a person needs depends a lot on his or her age. Babies
sleep a lot — about 14 to 15 hours a day! But many older people only need about