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Why The World’s Rarest Fish Is Trapped In The Hottest Desert On Earth

Season 2 Episode 9 | 7m 46s

With under 40 pupfish left in the wild, these are possibly the rarest fish on the planet. The Devils Hole pupfish have existed in isolation for thousands of years in an extreme environment where few species could survive. How did they end up in such an inhospitable place? And what makes their survival so important?

Aired: 10/13/25
Extras
Get ready for the all-new season, coming January 17, 2027 at 9/8c.
The cast play a game of "What's in the vet bag?" with sentimental props from the series.
Miss Scarlet returns for Season 7, the final season, on January 17, 2027 at 8/7c.
Celebrate the legacy of Gene Wilder, the actor behind Willy Wonka and Young Frankenstein.
Stephanie J. Block and Sebastian Arcelus join The Tabernacle Choir for an epic holiday celebration.
A beloved and joyful Messiah chorus celebrates the joy and promise of Christ’s birth.
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Ariel Ramírez's Nativity story shines in this peaceful Argentine Christmas folk-inspired work.
Mendelssohn's stirring call to "Rise! Up! Arise!" shines in this powerful choral anthem.
Stephanie J. Block brings charm and warmth to this lively French Christmas carol.
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