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In this episode of The Atlas Obscura Podcast, we chat with friend of the show Amir Siraj, who shares the wild tale of his search for an interstellar object—a journey that led the astrophysicist to the bottom of the ocean floor.

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.

Navicore, CC BY 3.0/Wikimedia