Smart-paint heals corrosion in tanks

The US military is developing smart-paint for its armored vehicles. The paint will be a-crawl with "microscopic electromechanical machines… that could detect and heal cracks and corrosion in the bodies of combat vehicles, as well as give vehicles the chameleon-like quality of rapidly altering camouflage to blend in with changing operating environments."

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(Thanks, Higgins!)