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Trilobites: Watch a Robotic Hand Play the Piano With a More Human Touch

The first, from “Toccata,” by the Italian composer Scarlatti, requires a series of punctuated, or staccato, raps, usually performed with the index finger. The engineers found that keeping this forefinger very stiff came closest to approximating how a human would play the notes. They made the surrounding digits less stiff, …

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