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It Looks Like a Desert. But It Has Thousands of Lakes

Season 2 Episode 10 | 8m 53s

Lençóis Maranhenses sits at the intersection of three biomes—a rare overlap that supercharges biodiversity. Across 350 square miles of dunes, the rainy season brings thousands of crystal blue lagoons into view, many big enough to swim in. What makes this surreal environment possible? And why, even after 2 million years in existence, does it still feel so mysterious?

Aired: 10/27/25
Extras
Explore the life and legacy of notable Black scholar and civil rights pioneer W.E.B. Du Bois.
Rosalind surprises Cyril when he shares his plans for their weekend away.
Cyril and Rosalind discuss his upcoming divorce.
Cyril asks Rosalind to go away for the weekend.
Follow filmmaker Julie Forrest Wyman as she searches for her place in the little people community.
The Turner children are hard at work planning their time capsule.
Everyone is talking about the time capsule, including the women of Nonnatus House.
Phyllis shares a touching time capsule message with Miss Higgins.
Sister Catherine finds the perfect way to ensure Nonnatus House is never forgotten.
Rosalind faces a troubling domestic issue as Joyce befriends a single mother with placenta previa.
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