IEEE Spectrum |
| 'Mass Equals Time' Redefines Weight Standards Posted: 11 Jan 2013 01:34 PM PST  New measurements of the matter-wave Compton frequency presage a quantum-mechanical definition of mass  |
| Video Friday: CES Robots, FIRST Competition, and Power Loader Posted: 11 Jan 2013 12:54 PM PST  Check out the coolest robots from the Consumer Electronics Show and more!  |
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