With catalysts created by an MIT chemist, sunlight can turn water into hydrogen. If the process can scale up, it could make solar power a dominant source of energy.
An Indian startup thinks that the right software can make cheap phones a financial lifeline to hundreds of millions.
The social-networking strategy that took an obscure senator to the doors of the White House.
Austan Goolsbee is a new breed of economic advisor for a new kind of presidential candidate.
We profile some of the most innovative ideas of the Social Web.
Web 2.0--the dream of the user-built, user-centered, user-run Internet--has delivered on just about every promise except profit. Will its most prominent example, social networking, ever make any money?
The social network's technology manages a vast and rapidly expanding web of connections for its millions of users.
Social-networking sites are fighting over control of users' personal information.
Video is clogging the Internet. How we choose to unclog it will have far-reaching implications.
The Web is returning to its social roots. But is it getting ahead of itself once again?