Ancient DNA from Rare Fossil Reveals That Polar Bears Evolved Recently and Adapted Quickly

Polar bears are a geologically very new species-

This is quite relevant because we have been discussing how grizzly bears are displacing polar bears in the Arctic.  We already knew brown bears were polar bears’ ancestors.

Ancient DNA from Rare Fossil Reveals That Polar Bears Evolved Recently and Adapted Quickly. Science Daily.





  1. monty Avatar

    Recently, on a National Geographic TV program, they covered the killing of a “wierd” looking bear (northern Yukon) that they suspected was a cross between a polar & grizzly. The bear was predominatly white with brown coloring around the eyes with grizzly claws. As I didn’t view the entire program, I don’t know what the results were from the subsqeuent DNA analysis.

  2. Virginia Avatar

    For several years now, we have heard of the terrible plight of the polar bear, and yet no one seems to be taking it very seriously with the exception of those of us who believe the climate is changing and even we cannot do enough. When will the people who can do something about it figure it out before it is too late for these awesome creatures who “evolved recently and adapted quickly” as in 160,000 years? What will it take?

  3. Aaron M.C. Avatar

    It would be better termed variation among bears, not evolution. Technically, polar bears and grizzlies are the same animal.

    “Evolution” would denote the development of new biological machinery. Unless, of course, if you term variation within an animal, and development of new biological machinery, both as evolution.

  4. monty Avatar

    Virigina, in terms of climate change, Bill Gates–finally–has joined in the debate. To read his speech “Goggle” TED!