World’s Strangest

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New Knowledge about Sea Urchin Teeth Could Lead to Knives that Never Need Sharpening

Researchers led by physicist Pupa Gilbert of the University of Wisconsin at Madison examined how sea urchins are able to maintain razor-sharp teeth throughout their lives without any apparent means of sharpening them. Their findings could lead to the development of knives that never need to be sharpened: “The sea urchin tooth is complicated in its [...]