A frozen wolf discovered in Siberia turned out to be 44,000 years old. It's so well-preserved that scientists are checking its gut for ancient viruses.

A frozen wolf discovered in Siberia turned out to be 44,000 years old. It's so well-preserved that scientists are checking its gut for ancient viruses.

North-Eastern Federal University

This wolf looks pretty good for its age, considering it's 44,000 years old.

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