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From teeth to thorns: Coincidences shape the universal form of nature's pointed tips
- April 10, 2026 at 8:20 PM
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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. Most of us have been stung by a bee, bitten by an animal, or scratched by a thorny bush. But very few of us have probably taken a close look at nature's painful, pointed tips.
Originally published at Phys.org