Developers at a Silicon Valley ARM developer conference this week used a Lego Mindstorms robotics kit hooked up to an HTC Nexus One smartphone running on Android to do in 12.5 seconds something that many of us have spent hours attempting: solve a Rubik's Cube. David Gilday, the engineer who put the demo together, said it took 18 months to get the puzzle master to its current proficiency.

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