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TechDiagnosing the Developing World
Researchers are learning how to adapt sophisticated technologies to meet the health-care needs of the developing world.
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Code Breakers
Chemical tags applied to proteins that DNA wraps around regulate genetic activity.
By John Travis -
AnimalsWhere’d I Put That?
Birds that hide and recover thousands of separate caches of seeds have become a model for investigating how animals' minds work.
By Susan Milius -
MathTurning a Snowball Inside Out
Turning a sphere inside out without allowing any sharp creases along the way is a tricky mathematical maneuver. Carving an intricate snow sculpture depicting a crucial step in this twisty transformation presents its own difficulties.