A selection of podcasts by the Editors of Encyclopaedia Britannica.
John Rafferty of Encyclopaedia Britannica discusses the polar bear, a mammal that is among the world's largest carnivores on land, and the threats to its survival. This is the second part of the Postcards from the 6th Mass Extinction audio series.
Postcards from the Sixth Mass Extinction, 2nd program. John Rafferty, speaker & writer; J.E. Luebering, sr. editor; Jisun Kim, content advisor; Kurt Heintz, producer
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