World Sleep Day, an event organized by the World Association of Sleep Medicine, is held on March 16. The alternation of wakefulness and sleep is a characteristic of all living creatures. But unlike humans with their night-ordered rest, animals sleep when it is convenient for them: some sleep during the day, some at night and some barely sleep at all.
A pillow for every animal
© RIA Novosti . Sergei Yolkin
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World Sleep Day, an event organized by the World Association of Sleep Medicine, is held on March 16. The alternation of wakefulness and sleep is a characteristic of all living creatures. But unlike humans with their night-ordered rest, animals sleep when it is convenient for them: some sleep during the day, some at night and some barely sleep at all.
