https://www.wired.com/story/knives-frozen-feces-kinda-crappy/

Famed anthropologist Wade Davis inadvertently created an academic urban legend with his account of an elderly Inuit man in the 1950s who fashioned a knife out of his own frozen feces and vanished into the Arctic. That's the conclusion of a new study by experimental anthropologists at Kent State University, who fashioned their own blades out of frozen feces—for science!—and tested them on pig hide, muscle, and tendon under ideal conditions. The knives failed every test.

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