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Published: Nov. 7, 2017, 11:41 p.m.

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This week we talk about George Catlin, porcupine caribou, and the Bogd Khan Mountain.

We also discuss Yosemite, the Department of the Interior, and the Louisiana Purchase.

This is a public episode. If you\\u2019d like to discuss this with other subscribers or get access to bonus episodes, visit letsknowthings.substack.com/subscribe'