Man, the Tasmanian devils just can't get a break.<p>The link notes that only two other species have been known to have transmissible cancers. Dogs and soft-shell clams. The fact that devils now have a second form of transmissible cancer makes the researchers wonder if transmissible cancers might be less rare than expected or that something in the devils DNA makes them more susceptible to cancer than other creatures.<p>I just did some casual research, and it turns out that there are four known types of transmissible cancers. The other known one is a contagious cancer found in Syrian hamsters that's spread by mosquito bite.<p>That's the most interesting one I've heard of.<p>A good rabbit-hole starting point on this is <a href="https://en.wikipedia.org/wiki/Clonally_transmissible_cancer" rel="nofollow">https://en.wikipedia.org/wiki/Clonally_transmissible_cancer</a>