From NatureWorldNews.com:

11,000 years ago, the last Ice Age wiped out several species around the world. The change in climate brought about scarcity of food for wildlife. An extinction event happened so quickly in a short geologic time scale, causing one-third of all existing species to disappear.

Although a new ecosystem immediately emerged right after, some species survived the catastrophic event which is mass extinction. One of them being the gray wolves.

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