Research shows how much the NSA could glean from call records, and why efforts to downplay the significance of such metadata are misleading.
Beyond the drilling rigs, the fossil-fuel industry spreads far and wide across the land.
In transforming the way cacao farmers supply manufacturers, a ?San Francisco startup is creating a superb product.
Plastics have become synonymous with waste, but they can be made sustainably.
Compact unmanned aerial vehicles will perform many valuable jobs if aviation regulations allow them to operate commercially.
Techniques that can soften or erase memories raise many ethical questions.
From different angles, two of our feature stories explore the role of humans in an automated world.
A 1938 article anticipated the opportunities—and challenges—of harnessing the sun’s energy.
Zeroing in on black carbon may slow the effects of greenhouse-gas emissions.
Mining data to help companies improve