Their ancestors evolved into a family of small mammals known as the Miacids (Miacidae).The bears, small bears and also the canines developed from the Miacids. That makes it difficult to trace their evolution from a common ancestor with brown bears, she said. How did the polar bear evolve? Other caniforms are bears, skunks, seals, otters and weasels. Older pre-ice-age brown bears, dating to between 43,000 and 38,000 years ago, had a different genetic signature matching that of modern bears from eastern Europe. Follow LiveScience @livescience , … Apr 6, 2008, 00:39 IST Zoologists believe that the polar bear evolved from a species of brown bears in Siberia, making polar bears the eighth species of bears. Bears have changed over time many aspects to their physical form and life style evolved to be different from before.Even though change takes a while to occur it still happens and will continue to have because animals live in evolution they take change.People now can come to the realization of change taking place in our world, the animals in it, and our own. The polar bear has evolved over time from the common brown bear by changing its fur colour to white, the ideal colour to blend in with its ice-covered surroundings. dog-like carnivores. The cladogram is based on molecular phylogeny of six genes in Flynn, 2005. The evolution of bears as we know them today, started around 30 million years ago. Where did the bear really come from? With new data an international research team now documents that the separation from the brown bear … A prime example for this is polar bears and black bears. Nevertheless, the speciation of some individual genes has not finished yet which additionally complicates the research of the evolution … The polar bear is the most recently evolved species and descended from a population of brown bears that became isolated in northern latitudes by glaciation 400,000 years ago. Follow Tia Ghose on Twitter @tiaghose . How did evolution make such a strange creature, and who are its relatives? Fish and Wildlife Service, NS 312, University of Montana, Missoula, MT Abstract. They are caniforms, i.e. DNA study clarifies how polar bears and brown bears are related Date: March 14, 2013 Source: University of California, Santa Cruz Summary: A new genetic study of polar bears and brown bears … The bears form a clade within the Carnivora. You’re probably aware that nature’s most badass animal is undoubtedly the tiny tardigrade, or water bear. 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