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From spiders that can walk on water and even breathe underwater, to ones that can weave glittering webs to catch prey by the dozens, and the mammoth tarantula that eats entire birds for breakfast.
From hives of naked mole rats, to the burrows of the bizarre aardvark, to zombie creatures that tunnel through decomposing flesh, this is nature's real freak show - underground.
One insect sprays molten-hot acid from its rear; another injects its larvae into living caterpillars, where the young gnaw their way out; the giant centipede roams the caves of Venezuela and hunts for its favorite meal: live bats.