Glimpses of a World Revealed by Cell-Phone Data
An examination of simple cell-phone records reveals maps of poverty levels, ethnic divides, and the movements of sports fans.
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A Smarter Algorithm Could Cut Energy Use in Data Centers by 35 Percent
Storing video and other files more intelligently reduces the demand on servers in a data center.
Watch the World’s Most Promising Young Technologists Pitch their Big Ideas
From EmTech 2012: young innovators present world-changing ideas in three minutes or less.
Why You Can’t Vote Online
Fundamental security problems aren’t solved, computing experts warn.
A Greener 'Artificial Leaf'
New device offers distinct advantages over previous attempts to improve upon natural photosynthesis.
China, a Global Center of Energy Innovation?
There is intense optimism that the country can become the "cradle of clean energy."
Wearable Sensors Watch Workers
Sensors that track social behavior highlight the benefits of face-to-face interaction.
Robotic Weather Planes
Fleets of robotic aircraft could improve weather forecasts.
Better Control for Fusion Power
A new control process may enable practical fusion reactors.
Efficient Thin-Film Solar Cells
The first prototype cell to use photonic crystals looks promising.
