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Ouch! A Closer Look at Porcupine Quills

Ouch! A Closer Look at Porcupine Quills

Source: Woo Kyung Cho, Harvard Medical School

In North America, meeting up with a porcupine can have painful consequences. It’s barbed quills are known to easily penetrate skin, and are very difficult to pull out. Researchers at Harvard Medical School have found just how easily they penetrate; a quill needs just half the force of a standard hypodermic needle. Why? Looking at the shape of the quill, the barbs fold back, allowing the arrow shape to dig into skin, but catching on to the same skin when pulled backward.

Source: ScienceNOW.

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  • himachal pradesh matric result
    March 25, 2019, 11:39

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