The Age of Polar Bears

FAIRBANKS- Scientists around the arctic are beginning to track the emergence of polar bears further into the past than previous evidence showed. While fossil records date back 100- thousand years, new genetic models estimate the species could be 1.2 million years old. Matthew Cronin, a researcher with the University of Alaska Fairbanks, has published the results online in the Journal of Heredity. He says if the DNA models are correct, polar bears could have survived past warming cycles.