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.
Fitness trends and health-care problems are creating demand for tiny computers we won't even notice we're carrying.
For some Silicon Valley investors, mobile computing is the only thing worth betting on.
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.
Klik uses facial-recognition technology to identify who you're shooting.
As petroleum production gets trickier, digital innovation becomes more crucial.
Sonic Notify uses sound waves to let your smart phone pull up everything from coupons to music videos.
The corn ethanol industry is booming, but cellulosic biofuel production is far behind schedule.
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 »
Under the right circumstances, solar cells from Semprius could produce power more cheaply than fossil fuels.
By Harry Perry and Harold Berkson
The production of energy creates a host of by-products. Our success in dealing with them depends on converting them from wastes to resources - a task on which we have made but a small beginning.
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