Return to the Giant Crystal Cave

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Science Documentary hosted by Andres Williams, published by National Geographic in 2010 - English narration

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Return to the Giant Crystal Cave Revisit the remarkable Mexican cave decorated with shimmering 11-metre crystals. Could it hold the key to the origins of life on earth? Venture deep beneath Mexico to visit one of nature's greatest wonders - a shimmering cathedral packed with 11-metre-long crystals, 1000 feet down in a working lead mine. This secret place is as deadly as it is beautiful. With a temperature of 45 degrees Celsius and humidity over 90 per cent, it could kill an unprotected human in 30 minutes. In fact, on the first scientific mission to explore it in 2007, it very nearly did. Despite the danger, our team has returned to revisit one of the world's most amazing subterranean spaces. In a race against time, one team explores the original site while another group risks their lives by descending into a newly drilled shat in the hope of discovering an interconnected system of underground chambers. Could this place really hold the key to understanding the origin of life on Earth and the possibility of encountering it on other planets? And can the team unlock all this marvel's mysteries before the cave is flooded and lost forever? Find out in Return to the Giant Crystal Cave.