Have you ever seen an island on a lake? On an island? On a lake? On another island? Josh Calder has. Working in a dusty room of a library, he first saw one on a map, and has been fascinated with these “recursive islands” ever since. Song bud Alan Goffinski takes us on a wild journey into these secret bullseyes hiding all over planet Earth. We learn from ecologist Elba Montes why recursive islands breed species found nowhere else on Earth, and thus are hotbeds of evolution.

Check out Josh Calder’s website for more island information and trivia.

Terrestrials was created by Lulu Miller with WNYC studios. This episode was reported, produced, and features original music composed by Alan Goffinski. Our team includes Alan, Mira Burt-Wintonick, Ana González, Tanya Chawla, Sarah Sandbach, Valentina Powers and Joe Plourde. Fact checking by Natalie Middleton.

Special thanks this episode to kid advisors Lola and Evie Young, and to Julie Abodeely, Sarita Bhatt, Shannon Webb-Campbell, Jae Johnson, Jeremy Stern. And thanks to the musician Timbre for plucking her harp and singing along to this episode.

Our advisors are Ana Luz Porzecanski, Andy J. Pizza, Anil Lewis, Dominique Shabazz, Liza Demby, Princess Daazhraii Johnson and Tara Welty.

Learn more about storytellers, listen to music, and dig deeper into the stories you hear on Terrestrials with activities you can do at home or in the classroom on our website,

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Support for Terrestrials also comes from the Simons Foundation, the Arthur Vining Davis Foundations, and the John Templeton Foundation.

The Bullseye: Treasure Hunt to Recursive Islands

Terrestrials