Just found out recently that bees have been trained as bomb detectors and are able to detect hidden landmines.
Not only that but honeybees have also been trained to detect illness in the human body cancer being one of the illnesses.
Scientists have found that honey bees the species Apis mellifera have an extraordinary sense of smell that is more acute than that of a sniffer dog because of this they can detect airborne molecules in the parts-per-trillion range.
Bees can be trained to detect specific chemical odours, including the biomarkers associated with illnesses such as tuberculosis, lung, skin and pancreatic cancer.