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Two men who build an experimental excavating vehicle discover it cannot be turned, and it burrows 500 miles into the Earth's crust, emerging into the unknown interior world of Pellucidar.
Edgar Rice Burroughs
Edgar Rice Burroughs was an American fiction writer best known for his celebrated and prolific output in the adventure and science-fiction genres. Among the most notable of his creations are the jungle hero Tarzan, the heroic Mars adventurer John Carter, and the fictional landmass within Earth known as Pellucidar.
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