John Rafferty of Encyclopaedia Britannica discusses the challenges of protecting the world's smallest porpoise, the vaquita, from extinction. This is the first part of the Postcards from the 6th Mass Extinction audio series. 

Postcards from the Sixth Mass Extinction, 1st program. John Rafferty, speaker & writer; J.E. Luebering, sr. editor; Jisun Kim, content advisor; Kurt Heintz, developer

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