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Sep 11, 2023, 2:16 pm202 pts
Ars Technica
Enlarge / A selection of images drawn in water (linear scales: 250 µm) using an ion-exchange bead as a "pen." (credit: Thomas Palberg, Benno Liebchen/CC BY-NC-ND) Human writing and drawing dates back at least 30,000 years and incorporates traditional techniques such as carving, engraving, and printing/writing…
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