Journey through subterranean worlds to discover the surprising, dramatic, awe-inspiring and magical places that lie hidden beneath our feet Watch intrepid cave divers chart the beautiful Mayan underworld, scientists explore an underground lake sealed by ice for 4 million years....see caverns that are home to a million bats and others that provide life to herds of visiting elephants, caves excavated for human settlements 18 stories deep and labyrinths drenched in fairy-tale crystal. Egyptian tombs and Peruvian pyramids reveal ancient treasure troves and sites of chilling human sacrifice. Excavations unearth hidden records of great events, sunken shipwrecks, an entire Roman city, tunnels which changed the course of wars and vaults that hoarded Nazi loot. Witness the breath-taking feats of underground engineering which irrigated desert cities in ancient times and those on which modern cities depend, that allow the earth's most precious resources to be mined and to sometimes save the lives of men trapped in doing so. And the latest underground technologies that have put scientists on the cusp of the most exciting discoveries of all; the energy that drives our solar system, the behaviour of elementary particles and the causation of the universe.
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