Inventor Manu Prakash thinks you can’t understand Earth’s big problems without looking at the (really) tiny things. So he created Foldscope: an origami microscope that brings science to people’s pockets. It costs less than $1 to build, is portable and weighs less than 10 grams. There are more than 500,000 Foldscopes out in the world, and Manu hopes they’ll forge communities of curious problem solvers.

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