- Q&A: Steven Chu
The former energy secretary, who has begun chasing emerging technologies again, looks back on his successes and failures in government. - Our Fear of Artificial Intelligence
A true AI might ruin the world—but that assumes it’s possible at all. - A Pancreas in a Capsule
Stem-cell advocates pin their hopes on an artificial pancreas to treat diabetes. - Experiments Start on a Meltdown-Proof Nuclear Reactor
Transatomic Power has begun tests on a very cheap and compact molten-salt reactor. - Additive Manufacturing Is Reshaping Aviation
Advanced manufacturing technologies are leading to smaller jet engines. - Deep Learning Squeezed Onto a Phone
Artificial-intelligence software can make phones better at tracking your workouts and emotions. - Why We Don’t Have Battery Breakthroughs
A promising advance that came to nothing suggests what it will take to make cheap batteries for electric cars.
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