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a and its Creatures
5
Have you ever wondered why, among the world's
large mammals, kangaroos alone hop? It turns out
that hopping is the most efficient way of getting
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around at medium speeds. The energy of the bounce
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is stored in the tendons of the legs, and the intestines
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bounce up and down like a piston, emptying and
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filling the lungs without needing to activate the
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chest muscles. When you travel long distances to
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find a little feed, such efficiency is a must.er Have
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you also wondered why koalas sleep for a long time?
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This is basically for economical reasons. With their
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eyes shut for about 16-20 hours a day, they can save
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which
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energy as sleep requires very little energy. ts,
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