Naked mole rats often called "Sabre tooth sausages" have the worst sperm, in the animal kingdom, with their most bizarre members and sharp teeth.
Their life expectancy is 20 years compared to other rats. They are blind and live entirely in a range of underground tunnels. They can only recognise each other by smell. A group of scientists realized that the naked mole rats have really crappy sperm.
Unexpectedly, regardless of the low mobility and miserable function of their sperm, these naked mole rats are quite fertile and have many healthy descendants.
Some of us might find these naked mole rats hideous while others find them adorable, but anyway, the naked mole rat is a quirky creature, which is neither a rat nor a mole.
You can stop wincing now boys.
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