Summary Box: Engineers create ‘self-guided’ bullet

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A BREAKTHROUGH: Engineers at Sandia National Laboratories have figured out how to pack a processor and other electronics into a machine gun bullet.

THE SPECIFICS: At 4 inches long and a half-inch in diameter, the bullet directs itself like a tiny guided missile and can hit a target more than a mile away. It’s designed to twist and turn, making up to 30 corrections per second.

NEXT STEP: With most of the hard science done, researchers want to partner with a private company to complete testing of the prototype and bring a guided bullet to the market.