"Game for Cats" is an iPad app with a moving image (either a laser dot or a mouse) upon which all housecats are genetically obligated to pounce, repeatedly. It's almost unbearably adorable. But what about the less domesticated felines out there--lions, tigers, caracals, servals, and the housecat-sized Geoffroy's cat? Turns out they'll play with the app as well, even if their paws are iPad-sized to begin with.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.