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Photograph by Javier Trueba

This is certainly old news to the geologists in our midst, but I couldn’t believe my eyes watching this BBC video clip of Professor Iain Stewart exploring the amazing Cueva de los Cristales (Cave of Crystals) in Naica, Mexico. The cave is home to crystal beams as long as 36 feet long. Looks an awful lot like Superman’s Fortress of Solitude!

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Here’s the BBC clip: