Baghdad and in Washington, the bleak recognition that a new species of bomb -- the underbelly, or "deep buried," IED -- could demolish any combat vehicle in the U.S. arsenal "was a light-bulb moment...

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Researchers placed each bee in a tiny harness, exposed the insects to various explosive scents for six seconds, and then provided a sugar water reward. This Pavlovian conditioning soon caused a bee to extend its proboscis -- tongue -- in...