Will Jackson's Robo Thespian is amazing. Here he is summoning the grand reveal from Empire Strikes Back, which is just one of the many scenes he can perform on the fly via a custom software controller. Actors record their voices and transpose their gestures with motion-capture devices, and each limb and feature—all the way down to his cellphone-screen eyes—can be pre-programmed or controlled live. —John Mahoney
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Science is reinventing play, from extreme sports to gamification to ridiculous roller coasters to the playgrounds of tomorrow, and this issue is chock full of fun. Also, on a less fun note: Did global warming destroy my hometown?