Video: Moles 'Swim' Through the Earth

If you ever wondered why moles are such effective garden pests, the answer appears to be that they can “swim” through the earth. X-ray imaging reported in The New York Times reveals the critters shoving their way through couscous—selected for its similarity to soil—in a butterfly-stroke fashion. Other tests reveal that the little paws of the odd-looking mammals can exert a force 40 times their body weight.

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