As the leaves begin to change and the air cools, monarch butterflies disappear from our skies and journey …where? The mysterious migration of this iconic butterfly stumped scientists for decades. Until an intercepted message on a butterfly wing led them to the isolated mountains of central Mexico to find the ancient monarch oasis where these butterflies cluster by the millions. It’s here we meet Estela, who grew up around this extraordinary phenomenon and explains that the real mystery isn’t where the monarchs are going but, actually, how??

The answer involves poisonous-tasting caterpillars, supergenerations of buff butterflies, and a web of life that connects a whole continent. Plus, as many people prepare for their Day of the Dead celebrations, we learn how monarch butterflies are a symbol of connection to the ancestors living on in our memories.

Terrestrials was created by Lulu Miller with WNYC studios. This episode was produced by Ana González with sound design by Mira Burt-Wintonick. Sarah Sandbach is our Executive Producer. Our team also includes Alan Goffinski, Tanya Chawla, Natalia Ramirez, and Joe Plourde. Fact checking by Hilary Elkins.

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