Breakthroughs in nanotech are making it possible to churn out cheap, flexible solar cells by the meter. Soon your cell phone may be powered by the sun.
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Japanese mobile-phone giant NTT DoCoMo is replacing house keys, credit cards, and train passes with a phone that does it all.
A look at some of the building technologies that are enabling new skyscrapers to shatter height records.
Gadgets that let you control computers with a wave or a nod could offer an escape from keyboards and mice.
Blood tests that detect cancer in its early stages would save countless lives. The first could arrive within a year.
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