The browser or device you are using is out of date. It has known security flaws and a limited feature set. You will not see all the features of some websites. Please update your browser. A list of the most popular browsers can be found below.
TechKnow is a weekly series that explores how the latest scientific discoveries are changing our lives. Our geeky contributors use their diverse backgrounds in science and technology to expose the controversies and celebrate innovative breakthroughs in the U.S. and around the world.
Homeless population in Los Angeles rises 15 percent despite decline nationwide
The Hovding—a new bicycle helmet that doesn't cover your hair—tries to mix safety with style