Atom-thick sheets of carbon make high-energy capacitors.
Combining optical and electrical circuits should speed supercomputers.
Scientists discover how some tumors become immune to medications.
Getting advertisers to quit tracking you may be harder than you think.
WikiLeaks wants to undermine states and corporations by interfering with their ability to "think." It may not survive, but its innovations will be imitated.
Foursquare and other location-based social games on mobile phones can be compelling, but only when they harness the energy of countless offline games we're already playing.
Our second annual list of the world's most innovative technology companies highlights businesses whose work is changing industries and lives.
Every clean-tech startup these days claims to have a breakthrough that will finally make renewable and clean energy sources cheap enough to compete with fossil fuels. But are we really on the brink of a clean-energy economy?
Google's growth plans depend in part on whether it can make the entire Web faster.
Square, founded by the creator of Twitter, lets people accept credit cards with their smart phones. That innovation could transform transactions in surprising ways.