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Through TIME's Made by History series, Blair and Frohlich utilize their research to transform current event stories into captivating articles explaining the U.S. political and social scene from its core.
The Kassel Hand, one of the only surviving mechanical limbs of its kind from the 1500s, has been a mystery for some time. Because of its age, condition and the environment it must be kept in, no one knew exactly how it worked. Until now.