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An African clawed frog sprawls flat on its belly, showing a bumpy, textured back, bulging eyes and long webbed hind feet. One hind leg has regrown into a paddle-like limb with digit-like tips, the centerpiece of this regeneration study. The forelimbs reach out with slim fingers and the skin wrinkles realistically at the joints. A thoughtful piece for bioelectricity and regeneration lessons, a biology classroom or a shelf of lab animals.

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