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"Arcadia program will work with nature to develop "probiotics" for military materials and equipment to prevent corrosion, decrease drag.(...) Bacteria are the most abundant and diverse lifeform on Earth, coating almost every surface, with the majority spending their lives in biofilms.his lifestyle is universally perceived as problematic since biofilms contribute significantly to equipment degradation. However, biofilms do not have to be a problem. New insights suggest biofilms could be rendered beneficial by redirecting their composition and structure. Similar to the Arcadian vision of harmony with nature, the DARPA Arcadia program will develop "probiotics" to protect military materials and equipment using naturally occurring microorganisms to generate robust and beneficial coatings."