The world's oldest Douglas fir trees have lived over 1,000 years

Leftover Christmas trees at the Chicago Zoological Society’s Brookfield Zoo were repurposed as treats for animals, including bears, a tiger, and a lion. The trees, Douglas firs, are known for their longevity, growing up to hundreds of feet high and living for over 1,000 years. These trees, named after botanist David Douglas, provide habitats for various creatures and are a food source for animals.

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