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The former energy secretary, who has begun chasing emerging technologies again, looks back on his successes and failures in government.
A true AI might ruin the world—but that assumes it’s possible at all.
Capital and engineering talent have been flocking to seemingly trivial mobile apps. But would we really be better off if more startups instead went directly after big problems?
A promising advance that came to nothing suggests what it will take to make cheap batteries for electric cars.
Early in the Web era, a prominent technologist said the Net offered a way for the poor and the marginalized to gain power.