He Walks With the Animals

When Yellowstone became the first national park in the world, cutting off 2.2 million acres from development, he points out, "people yelled and screamed. Today, can you find any Americans who think that was a mistake?

"Once a species is gone, it's gone--and you've interfered with evolution. Nobody knows how many bricks you can take out of a house before it collapses."

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