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 functions, such as cardiovascular performanc... More » Science Biology

According to the National Institutes of Health, an average human spends about one third of his life sleeping. Assuming an average human life span of 78 years, that equates to about 26 years each person spends sleeping in... More »

Biologically, moose sleep just like their deer relatives do, by laying on their side, curling up and resting their heads on their bodies or legs. To create a suitable place to sleep, moose simply stomp down the ground by... More »

Psychologists take human biology into account during consultations, diagnoses and studies because very often, psychological and physiological health in humans is related. Many psychological conditions stem either partial... More »

REM sleep is also called paradoxical sleep because in this state, the sleeper is difficult to wake-up in spite of showing the brain waves associated with waking, hence the term paradoxical, as the state itself is somewha... More »

Most people can stop the problem of drooling in their sleep by changing their sleep position. Dr. Celite Kushida of the Stanford University Center for Human Sleep Research advises people with sleep-related drooling issue... More »

You do not swallow saliva in your sleep because facial muscles are relaxed. Most people wake up with saliva in their mouth, which is instantly swallowed once that person wakes up. While sleeping, people do produce saliva... More »