ArkRescue
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"Jan. 23, 2014 — A cancer normally lives and dies with a person, however this is not the case with a sexually transmitted cancer in dogs. In a study published in Science, researchers have described the genome and evolution of this cancer that has continued living within the dog population for the past 11,000 years."
Genome of longest-living cancer: 11,000-year-old living dog cancer reveals its origin, evolution
Genome of longest-living cancer: 11,000-year-old living dog cancer reveals its origin, evolution