Mobile Call Logs Can Reveal a Lot to the NSA
Research shows how much the NSA could glean from call records, and why efforts to downplay the significance of such metadata are misleading.
Story Archive
America's Petrochemical Landscape
Beyond the drilling rigs, the fossil-fuel industry spreads far and wide across the land.
A Chocolate Maker’s ?Big Innovation
In transforming the way cacao farmers supply manufacturers, a ?San Francisco startup is creating a superb product.
Greener Plastics
Plastics have become synonymous with waste, but they can be made sustainably.
Flying Robots
Compact unmanned aerial vehicles will perform many valuable jobs if aviation regulations allow them to operate commercially.
Deleting Memories
Techniques that can soften or erase memories raise many ethical questions.
Adapting to Automation
From different angles, two of our feature stories explore the role of humans in an automated world.
Untapped Potential
A 1938 article anticipated the opportunities—and challenges—of harnessing the sun’s energy.
Cleaning Up Diesel Trucks and Cooking Stoves Could Reduce Climate Change
Zeroing in on black carbon may slow the effects of greenhouse-gas emissions.
Ben Waber, PhD ’11
Mining data to help companies improve
