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An Eternal Hug, Flea Jump Facts, Fitness Feedback Loops

Curiosity Weekly

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Why Do Fleas Need All That Jumping Ability?

Fleas have a builtin spring system, and with it they can go way farther than they ever could with just their legs. The simple answer is that they need all that jumping ability to feed. They survive by sucking the blood of their hosts. This food source is crucial for the fleas because they can only breed and lay gs after they've had a meal. Therefore, the fleasability to leap into the furs of different animals like cats and dogs is superimportant for their existence.

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