At Technology Review, putting together the TR35--our annual list of outstanding young innovators--is one of the best parts of the job. Selecting these 35 men and women, all under the age of 35, takes the better part of a year, from soliciting nominations to vetting them to gathering the opinions of the experts we depend on to help us choose the best of the best (see a list of this year's judges). This year we began with more than 300 nominees. Settling on just 35 was a challenging task, one that led to lively discussions around conference tables and in hallways.

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