Why the Tasmanian devil might be more susceptible to transmissible cancers

Cancers that can jump from one animal to another of the same species are rare, but the endangered Tasmanian devil is doubly unlucky: in recent years, two transmissible cancers affecting them have been identified. A comparison of these cancers suggests that they are similar in origin, leading researchers to believe that devils may be at greater risk for these kinds of diseases.
Source: Science Daily