Polar Bears, Brown Bears, and Ireland

New DNA evidence shows that polar bears carry genetic material that came from Ireland, where grizzlies (brown bears) once roamed around 30,000 years ago. The finding could change our view not only of polar bear evolution but of the role of cross-species breeding more generally in shaping the living world.

Articles to Share with Students

General Polar Bear Information

Questions for Classroom Discussion

  • What data did the scientists study to achieve their results?
  • What is the significance of this discovery?
  • How could cross-species breeding shape our living world?
  • How might this new information alter conservation efforts?

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