Research shows how much the NSA could glean from call records, and why efforts to downplay the significance of such metadata...

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Zeroing in on black carbon may slow the effects of greenhouse-gas emissions.

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A scientist who has anguished over terrors in her family’s history explores how people might erase the trauma from memories.

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Automation is reducing the need for people in many jobs. Are we facing a future of stagnant income and worsening inequality?

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By eschewing grit and realism for creativity and simplicity, Minecraft shows how bedroom programmers can create global hits.

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