Scientists have put the incredible smelling powers of a dog to good medical use. Sniffing out cancer.Japanese scientists trained a black Labrador Retriever, named Marine, that they say can sniff out colorectal cancer with up to 98 percent accuracy, according to CTV News. Better yet perhaps, her abilities are more accurate than some tests currently used to diagnose the cancer, namely the fecal occult blood test, which accurately predicts the cancer only 10 percent of the time.Read More... More on Dogs