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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
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