In the wake of Facebook's billion-dollar Instagram buyout, video-sharing apps are jostling to become the next big thing.
A look back at the moments that have shaped Facebook's success.
Delphi says its diesel-like engine runs cleanly on gasoline.
Yes, of course, but things got out of hand. A quarter of executives admit to having slept with a smart phone.
Fitness trends and health-care problems are creating demand for tiny computers we won't even notice we're carrying.
At its electric-car factory in Silicon Valley, Tesla obsesses over details like making its own high-tech tools.
Photographs by John Stocklin
Running the world's largest social network will be a technical and financial challenge as it grows.
It's the first study to show that brain chips can assist paralyzed people to perform complex real-world tasks.
A startup blends activity tracking with online incentives in hopes of getting kids into shape.
The company is losing money fast. It hoped to raise money to stay afloat.
A wearable brain scanner could give computers insight into how hard you're thinking.
A new type of eye implant requires less hardware and could restore more vision than existing devices.
The proof-of-concept device concentrates sunlight to break apart limestone.
Peratech thinks printable electronic sensors of volatile compounds could find their way into textiles.
Microsoft is revamping its search engine and exploiting the growth of social networking online.
New data show that its products cost more than $30 a gallon to make.
A Technology Review Special Report focusing on innovations in alternative energy sources and the technologies driving them.
Our list of the 10 most innovative technologies of 2012. See list »
By David J. Rose
Enormous difficulties have developed in the attempt to control the energy of the stars. But that is inevitable at this stage of humankind's largest technological venture.
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