Want more charts like these? See our charts on the secrets of the jobless recovery, the richest 1 percent of Americans, and how the superwealthy beat the IRS. How Rich Are the Superrich? A huge share ...
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Princeton-built 3D-printed soft robot moves and folds using heat, not motors
A paper crane that flaps its wings without a single motor inside it sounds like a magic trick. But engineers at Princeton ...
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