Sleep (non-human)
Sleep in non-human animals refers to how the behavioral and physiological state of sleep, mainly characterized by reversible unconsciousness, non-responsiveness to external stimuli, and motor passivity, appears in different categories of animals.
Rats kept from sleeping die within a couple of weeks, but the exact function of sleep is still unknown.
Read more about Sleep (non-human): Definition, Unihemispheric Sleep, Sleep in Hibernating Animals
Famous quotes containing the word sleep:
“Bunched upside down, they sleep in air.
Their sharp ears, their sharp teeth, their quick sharp faces
Are dull and slow and mild.
All the bright day, as the mother sleeps,
She folds her wings about her sleeping child.”
—Randall Jarrell (1914–1965)