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    Naked mole rats have the world's ugliest, most sluggish sperm

    More than 90 percent of the naked mole rat's sperm was too deformed to move, according to new research.

    MotherNature
    by MotherNature

    Community Contributor

    Naked mole rats have the world's ugliest, most sluggish sperm

    mnn.com

    In other words, the sperm look a lot like the animal. Scientist Liana Maree of the University of the Western Cape in Bellville, South Africa, found that only 7 percent of naked mole rat sperm even moved. The sperm that did move clocked in at around 35 micrometers per second-- the slowest of any mammal in the world.

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