The B-15 iceberg in Antarctica was the largest iceberg in recorded history. Explorer Jill Heinerth wanted to see what it looked like from the inside. She assembled a team of the most accomplished divers in the world, and they traveled for 12 days through the rough waters of the Southern Ocean. Attempting to dive into cracks in the iceberg, her life was in very real danger three times. And the third time, she would be saved by an animal so small, so transparent, that you can see its heart beating right through its skin. Jill Heinerth’s book is ⁠Into the Planet⁠. This episode first aired in 2020. Say hello on Facebook and Instagram. Follow the show and review us on Apple Podcasts. Want to listen to This is Love ad-free? Sign up for Criminal Plus – you’ll get to listen to This is Love, Criminal, and Phoebe Reads a Mystery without any ads. Plus, you’ll get behind-the-scenes bonus episodes of Criminal and other exclusive benefits. Learn more and sign up here. We also make Criminal and Phoebe Reads a Mystery. Artwork by Julienne Alexander. Check out our online shop. Episode transcripts are posted on our website. Learn more about your ad choices. Visit podcastchoices.com/adchoices