While some rats may have bad rap, the African giant pouched rat (Cricetomys ansorgei) is helping to save lives in Tanzania. These rodents have an acute sense of smell and are trained to sniff out landmines and even detect tuberculosis in patients. From their pouched cheeks to their scaly tails, these large rats can grow up to 3 feet long and are as common in Tanzania as an Eastern gray squirrel is here. But much remains to be learned about the behavior and biology of these amazing African creatures. Dr.