Big machines that dig out of the ground at high speed go out of control. They cut through the earth to the world of pellucidar at full speed, and they don't slow down. Dr. Perry and David Innes are attacked by half humans, lizard-like birds, and plants that eat humans when they get there.
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Big machines that dig out of the ground at high speed go out of control. They cut through the earth to the world of pellucidar at full speed, and they don't slow down. Dr. Perry and David Innes are attacked by half humans, lizard-like birds, and plants that eat humans when they get there.
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