by Karen Kirkpatrick
The answer to this question depends on a definition that has changed over time. At one time, scientists thought that brown bears and grizzly bears were separate species, but today, they are considered the same species, Ursus arctos. There isn’t a consensus on how best to classify them or how many subspecies there are, however. An estimated 200,000 brown bears live primarily in North America and Russia
. The Mexican grizzly is a subspecies of brown bear, so cursory research would seem to indicate that the Mexican grizzly is not extinct.
However, if you do a little more digging, you’ll find that the International Union for Conservation of Nature produced a book in 1982 stating that Mexican grizzlies were extinct. The IUCN is the organization that tracks…
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