In Ep. 6, we look at how human-made contaminants in the ocean are compromising killer whales and compounding the other problems they face. Fat soluble toxins move up the foot chain and accumulate in killer whales, who metabolize it in their blubber. Mothers also pass those contaminants down to their babies when nursing. Our guest is the excellent Peter Ross, who takes this complex subject and artfully breaks it down. Next week is the finale and it's a good one. See you then! 
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Music: Podington Bear
Whale sound: The Whale Museum