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When playing around with Sphero’s BB-8 toy, the miniature version of the personality-filled droid from the upcoming movie ‘Star Wars: The Force Awakens,’ it’s hard to not feel like it’s made with a little bit of magic. His little head floats atop his body, and he maintains his ability to be upright shockingly well. But it’s not magic — it’s well-developed science. There’s been plenty of speculation, based on Sphero’s patents, on how the big BB-8 is able to wobble and look around in the movie. So, it’s safe to assume analogous tech is used without pulverizing the miniature. After all,…

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