The Sleepiest Animals in the World and How Long They Rest
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Animal Sleep Patterns and Evolutionary Adaptations
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The animal kingdom has vastly different biological clocks; eight hours of night rest are optimal for the human. The amount of time an organism requires to sleep in a day is determined by its survival strategies and rates of metabolism, as well as its dietary needs. Some species may have no natural predators, and thus sleep is a luxury, while for other species, sleep is a means to save energy. These extremes are the focus of the fascinating diversity of evolutionary adaptations around the globe.