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In this episode of The Atlas Obscura Podcast, journalist Susan Casey takes us to the deep ocean, where she explores the relationship between humans and this mysterious underworld. Find out more about Casey’s work on her website, and check out her new book, The Underworld: Journeys to the Depths of the Ocean.

Our podcast is an audio guide to the world’s wondrous, awe-inspiring, strange places. In under 15 minutes, we’ll take you to an incredible site, and along the way you’ll meet some fascinating people and hear their stories. Join us daily, Monday through Thursday, to explore a new wonder with cofounder Dylan Thuras and a neighborhood of Atlas Obscura reporters.

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