A contagious cancer, spread by biting, has decimated the population of Tasmanian devils since 1996. Researchers have now identified a second contagious cancer in eight devils, making them question how rare contagious cancer is, according to a new study. In addition to attempting to breed devils identified as immune to the disease, scientists started working on a vaccine against Devil Facial Tumor Disease earlier this year -- which they said will not be thrown off by the discovery of a second form of the cancer. The cancer, which researchers believe is spread by common biting behavior, causes tumors and lesions...