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?
Hybrids, plug-ins, and extended-range electric cars are hitting the market. Use this interactive primer to learn how they work.
The philanthropic effort dubbed the $100 Laptop has not met its grand initial goals. But its first deployment, in Peru, may turn skeptics into believers.
Thousands of U.S. soldiers have survived powerful explosions in Iraq. Many are returning home with brain injuries that could result in long-term disabilities.
A new lithium-ion battery from A123 Systems could help electric cars and hybrids come to dominate the roads.
Technology Review presents its annual list of the 10 most exciting technologies.