Charles and Jon talk to Dr Barbara Taylor (USA) and Dr Lorenzo Rojas-Bracho (Mexico), who together lead the global efforts to save the Vaquita from extinction. The Vaquita, a tiny and beautiful porpoise, is found only at the top of the Gulf of California and holds the unfortunate distinction of being the world's rarest marine mammal (possibly the rarest of any mammal species). There may be as few as 6 animals left alive.The story of the Vaquita's precipitous decline from its discovery in 1958...