The connection between the intensity of sleep

The connection between the intensity of sleep, natural selection and the physiological needs of mammals must also be focused (Lesku et al. 2008). I also recommend that the area of sleep variation especially in human beings be given attention. No efforts have been put in place to study the reasons behind varying sleep patterns across mammalian cultures (Lesku et al. 2006). This applies mostly to human cultures. It might be possible that ecological conditions are the ones responsible for the varying sleep patterns in various human cultures since it has always been evident that the sleep patterns of city dwellers and those perceived as hunter-gatherers are always different (Kelmanson and Adulas 2002).

When doing research on sleep patterns, I also recommend that the researchers should focus on different environmental conditions of wild and domestic species of mammals. Maybe wild animals express different sleep patterns from the domestic ones due to lack of good shelter, stress and food among other stressful conditions. All these should be examined in details.