It would take more than 1,000 1,200-page volumes to contain the content of Wikipedia, but PediaPress has made an example volume to show what it might look like. "Our goal is to allow everyone to explore the physical dimensions of Wikipedia," says PediaPress founder Christoph Kepper. PediaPress hide caption

itoggle caption PediaPress

One of the earliest iPhone prototypes. This system was pieced together to test early versions of the iPhone's software. Courtesy of Apple hide caption

itoggle caption Courtesy of Apple

Attendees wear Oculus Rift HD virtual reality headsets at the Consumer Electronics Show in January. Robyn Beck/AFP/Getty Images hide caption

itoggle caption Robyn Beck/AFP/Getty Images