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.
A single graphene transistor can do the work of multiple conventional ones.
Hacked Facebook accounts produce most of the spam on the world's largest social network.
A new technique could provide safer cells for human therapies
Google and the geeks from Silicon Valley aim to revolutionize the 70-year-old TV industry. Conquering the Internet was easy in comparison.
Building wireless gadgets with multiple antennas could extend battery life.
Nanowire electronics take sensitive measurements inside cells.
Implanted devices measure blood sugar continuously for many months.