Why do almost all animals have darker fur on their backs and lighter fur on their bellies?

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This is what a whale explosion looks like!

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Super cool mechanical series of speed bumps!

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Yemen is the first country to be destroyed by drugs, even children are not spared. How tragic is it?

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Speed bumps!! A mechanical marvel men can't resist~

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What kind of wisdom did the ancients have to design such a sophisticated mechanism?

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