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Why Some Species Of Freshwater Fish, Oak Trees Are Dying Out05:48
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Bison, Europe's largest land mammal, forage in the recently fallen snow in the Bialowieza Forest in Poland. (Michal Kosc/AP)
Bison, Europe's largest land mammal, forage in the recently fallen snow in the Bialowieza Forest in Poland. (Michal Kosc/AP)

The International Union for Conservation of Nature has updated its list of extinct and endangered species. Jon Paul Rodriguez, chair of the IUCN's Species Survival Commission, explains why some certain species are dying out.

This segment aired on December 22, 2020.

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