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?
Square, founded by the creator of Twitter, lets people accept credit cards with their smart phones. That innovation could transform transactions in surprising ways.
Google's growth plans depend in part on whether it can make the entire Web faster.
Google and the geeks from Silicon Valley aim to revolutionize the 70-year-old TV industry. Conquering the Internet was easy in comparison.
The last decade expanded what we could do online, but the Web's basic programming couldn't keep up. That threatened to fracture the world's greatest innovation engine—until a small group of Web rivals joined forces to save it.
Ed Boyden is learning how to alter behavior by using light to turn neurons on and off.
An expected nuclear renaissance has failed to materialize as plans for new plants are scrapped or delayed. What happened?
Physicians can now use DNA sequencing to uncover the causes of rare genetic disorders.
Suntech CEO Zhengrong Shi made China a powerhouse in photovoltaic technology--and became a billionaire in the process. His next ambition: to make solar power as cheap as conventional electricity.
Drugs can control HIV, but they exact a steep cost. Now, researchers are pursuing radical new ways to eliminate the infection entirely.