From PBS Terra.

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?

Untold Earth explores the seeming impossibilities behind our planet’s strangest, most unique natural wonders. From fragile, untouched ecosystems to familiar but unexplained occurrences in our own backyard, this series chases insight into natural phenomena through the voices that know them best.

Untold Earth is produced in partnership with Atlas Obscura and Nature.

*****
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateTerra
*****

Subscribe to PBS Terra so you never miss an episode! https://bit.ly/3mOfd77

And keep up with PBS Terra on:
Facebook: https://facebook.com/pbsdigitalstudios
Tiktok: https://www.tiktok.com/@pbsterra
Instagram: https://instagram.com/pbsterra