Deadly Crystal Cave National Geographic

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A team of scientists explore a Mexican cave filled with giant crystals; some of the largest ever discovered. With temperatures near 120 degrees and over 80 percent humidity, the cave is one of the deadliest environments on earth. • ➡ Subscribe: http://bit.ly/NatGeoSubscribe • About National Geographic: • National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. • Get More National Geographic: • Official Site: http://bit.ly/NatGeoOfficialSite • Facebook: http://bit.ly/FBNatGeo • Twitter: http://bit.ly/NatGeoTwitter • Instagram: http://bit.ly/NatGeoInsta • Giant Crystal Cave : http://channel.nationalgeographic.com... • Deadly Crystal Cave | National Geographic •    • Deadly Crystal Cave | National Geogra...   • National Geographic •    / natgeo  

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