the idea that Cancer could behave like a contagious disease may seem absurd; In humans, cancer cannot be transmitted from one person to another. However, nature is still full of surprises. In rare cases, the cancer cells themselves can pass from one individual to another and continue to multiply in a new host. This rare
Mysterious black lesions found on brown bullhead catfish (Ameiurus nebulosus) in Lake Memphremagog, straddling the borders of Canada and the United States, turned out to be a type of transmissible melanoma. Credit: Phil Degginger/Alamy Researchers have discovered a contagious cancer in catfish, just the fourth example of tumor cells spreading naturally from one animal to
