In 1928, President Teddy Roosevelt's sons Teddy and Kermit set out on an expedition to hunt a semi-mythical beast: the Panda. Don's guest today to help tell the incredible story of what happened next is Nathalia Holt whose new book brings this tale to life: The Beast in the Clouds: The Roosevelt Brothers' Deadly Quest to Find the Mythical Giant Panda.

Edited by Tim Arstall, produced by Freddy Chick. The Senior Producer was Charlotte Long.

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All music from Epidemic Sounds.

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