Who else might be watching? Britain's spies collected millions of images from video chats, according to the latest secrets spilled by NSA leaker Edward Snowden. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

Images from a thermal imaging scanner are pictured on a computer screen at Bali's international airport. Sonny Tumbelaka/AFP/Getty Images hide caption

itoggle caption Sonny Tumbelaka/AFP/Getty Images

A 1992 copy of the world's first Web page. British physicist Tim Berners-Lee invented the World Wide Web in 1989. Fabrice Coffrini/AFP/Getty Images hide caption

itoggle caption Fabrice Coffrini/AFP/Getty Images

A map of the U.S. lists the musical acts that set states apart from each other. It's not a matter of an artist's popularity, says Paul Lamere, who made the map, but of a state's distinct preferences. Paul Lamere, Director of Developer Platform at The Echo Nest hide caption

itoggle caption Paul Lamere, Director of Developer Platform at The Echo Nest

Facebook founder and CEO Mark Zuckerberg at the 2010 event announcing Facebook's new email messaging system. This week, the company shuttered the service. Justin Sullivan/Getty Images hide caption

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The Narrative clip is a lightweight wearable camera, capable of shooting 5-megapixel images. You clip it to your lapel and it shoots two photos a minute. Jim Tuttle/NPR hide caption

itoggle caption Jim Tuttle/NPR