Venomous bloodworms grow deadly copper fangs with totally metal trick

A venomous bloodworm species grows bizarre, deadly metal teeth, and now scientists know how: with a single, simple protein that transforms copper deposits located at the bottom of the seafloor into fearsome fangs.

bloodworms (Glycera dibranchiata) are segmented, bright-red marine worms that can grow to be 14 inches (35 centimeters) long and have 0.08-inch-long (2-millimeters) needle-like teeth made from a mixture of proteinmelanin and 10% copper, the highest concentration in any animal.

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