The present invention relates to a method and system for providing biological detection. The system includes: at least one polymodal sensor for collectively detecting at least two conditions; and at least one node, each node including at least one of the polymodal sensors. The system also includes at least one data collector; each data collector communicating with one or more of the at least one node, and each data collector storing local information in a local knowledge base; and at least one server, each server communicating with one or more of the at least one data collector, and each server updating a global knowledge base. The at least two conditions are utilized in detecting the presence of biological activity from either one or both knowledge bases.