People were most melepasmu with primates

2018-03-12 09:47

People were most melepasmu with primates
Statistics predicts that people should sleep almost ten hours per day, but we can easily do the family – why, is still unknown.

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A comparison of the characteristics of sleep among different species of primates found that almost all of them are sleeping from 9 to 15 hours a day, whereas a man is enough and seven. Given the lifestyle and peculiarities of the physiology of our species one would expect that we need more than 9.5 hours, and while it’s hard to say why the brain is much less “rest time”. About Charles Nan (Charles Nunn) and David Sampson (David Samson) write in an article published in American Journal of Physical Anthropology, reports Rus.Media.

The researchers suggest that the reduced need for sleep may be due to the changing lifestyles of our ancient ancestors. The yield on the open expanses of the prehistoric savanna forced them to meet a lot of new predators, and the ability to stay longer on our guard had become a necessity. Later, this trend could get stronger when people have to give each other new experiences, learn and establish social ties, again at the expense of sleep time. Moreover, too long a sleep in humans can be associated with the development of nightmares.

The reduced sleep in humans Nan and Samson demonstrated by comparing its duration to 30 species of smaller primates (it is worth saying that the sample is not representative: the total number of modern types about ten times more). The authors also gave a theoretical prediction of the time of fast and slow sleep for each species, based on various aspects of physiology and nutrition, way and conditions of life of each species. For example, nocturnal primates sleep longer day.