Giant Crystals Create an Alien Landscape

This photo looks like it could have been taken on another planet - miners harvesting dilithium, perhaps. But this cave full of monstrous crystals is located in Mexico, and the crystals themselves are a form of gypsum, one of the most common elements on Earth. What geologic processes caused the crystals to get so‚Ķ » 10/23/08 10:10am 10/23/08 10:10am