This research demonstrated the population size and migration time period of when the polar bear and brown bear separated. Making a dependable time frame for when the polar bear emerged as a new species and how fast new adaptations to intense environments can occur in a large mammal. The population genomic formation evaluates the nuclear genomes of polar bear and brown bear populations. By doing so the researchers estimated when polar bears and brown bears diverged. They gather demographic history of the polar bear and brown bear to make it clear on what happened after they diverged. By discovering the genes under positive selection in polar bears to gain insight on the evolution of the two species, lastly, the genetic history on the adaptations
