The ATM strikes back: Researchers protect money with method borrowed from an aggressive beetle Its head and pronotum are usually rusty red, and its abdomen blue or shiny green: the bombardier beetle is approximately one centimeter long and common to Central Europe. At first glance, it appears harmless, but it possesses what is surely the most aggressive chemical defense system in nature. When threatened, the bombardier beetle releases a caustic spray, accompanied by a popping sound ...
April 12, 2014 - Science Daily