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This excellent ball-flinging robot, by YouTube user LordLal0, plays fetch with a dog and even keeps track of the number of times it has flung the ball. As the caption says, this is what happens when an engineer owns a dog. [Thanks, Robert]

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

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