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jampekka 3 days ago

Such work e.g. here: https://www.nature.com/articles/s41597-020-00704-x

ants_everywhere 3 days ago | parent [-]

hatching and crosses are used even today on tools to make them easier to grip. We'd expect them on smooth and hard tools made of bone or rock.

https://en.wikipedia.org/wiki/Knurling

jampekka 3 days ago | parent [-]

These patterns are found in paintings too.