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Making Solar Cells with Pure Pyrite

Cyrus Wadia is using abundant materials to grow nanocrystals for cheaper photovoltaics.

By Katherine Bourzac

Photo Galleries

Mimicking the Building Prowess of Nature

A Look Back at Three Mile Island

The Droid's Features

NASA’s Next Rocket Ready for Lift Off

Time Travel Through the Brain

An Astounding Collection

Robotic Hand Grasps a Number of Objects

Thermal Images of the Space Shuttle

Testing NASA's New Rover

Building Microfluidics Devices

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