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Emory University Neuroscientist and Behavioral Biologist Lori Marino says there is no evidence that zoos help promote conservation through education. For example, Japan has more marine parks than any other country in the world, but slaughters thousands of dolphins each year.

HSUS's marine mammal scientist Dr. Naomi Rose, author David Kirby of "Death at SeaWorld," and three former SeaWorld trainers visit Puget Sound and observe resident orcas, to compare their lives with those of captive orcas.