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Musician Mickey Hart in a cap that collects electrical activity in his brain. Tamarind Jones/Courtesy of Nvidia hide caption

itoggle caption Tamarind Jones/Courtesy of Nvidia

Artist's concept of NASA's Voyager spacecraft. For 35 years, the probes have been beaming images and information back to Earth via a 23-watt transmitter. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

"We got the number of the Vatican and called the pope," Steve Jobs says of the first project he worked on with Steve Wozniak. Later, the two founded Apple Computer. hide caption

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A status update's "meta" information, like its source device, can be used to help out a lame joke — or to drive the envy of frustrated early-adopters. NPR hide caption

itoggle caption NPR