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Tag Archives: mammals

Humans Evolved for Better Sleep In Less Time

Chimpanzees build beds in trees for a comfy night’s rest. Our closest animal relatives, chimpanzees sleep an average of 11.5 hours a night, whereas humans snooze for just seven hours. Photo courtesy of Kathelijne Koops, University of Zurich, Switzerland. Humans ...

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How Do Animals Walk on Water

 More than 1,200 animal species have evolved the ability to walk on water. Tiny creatures such as insects and spiders can do it, and larger ones such as some reptiles, birds and even mammals have also developed this talent. Though ...

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خواب Sleep

“Wake up!” Do you hear these words often? If so, maybe you are not getting enough sleep. What is  sleep? Why do people sleep? How much sleep do you need? All people sleep. All mammals and birds also sleep.Some reptiles, ...

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