Perinereis cultrifera carries jaws that blur the boundary between biology and metal. Built from proteins and metal ions, the ancient sea worm’s biting tools harden toward their tips and behave in ways... Perinereis cultrifera carries jaws that blur the boundary between biology and metal. Built from proteins and metal ions, the ancient sea worm's biting tools harden toward their tips and behave in ways usually associated with copper or silver. Researc... [7009 chars]
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