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From Teeth to Thorns: Coincidences Shape the Universal Form of Nature's pointed tips
April 10, 2026
KONGENS LYNGBY, Denmark, April 10 -- The Technical University of Denmark posted the following news:

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From Teeth to Thorns: Coincidences Shape the Universal Form of Nature's pointed tips

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We thought it was evolution, but an experiment with pencils shows that tips like teeth and thorns may owe their rounded shape to mechanical wear.

Christian Tremmer

Most of us have been stung by a bee, bitten by an animal, . . .

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