Two groups of dogs, living about 16 kilometres apart in the same ruined landscape, are genetically distinct from each other. The finding that started it: 302 dogs, three sitesThe starting point is a 2023 study in Science Advances. The team found that the dogs at the power plant were genetically distinct from the dogs in the city. The study found no evidence that an increased mutation rate or greater mutation accumulation was driving the difference between the power-plant and city dogs. “So perhaps there was extreme selective pressure at the start, and then the dogs at the power plant just remained separate from the city population.”