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Besides fanners and fishermenwho have found angleworms good bait for centuries-the earthworm aids archeologists. Their ceaseless activities over the centuries gradually have helped to cover and preserve ancient cities.
A few years ago, worms even pointed the way to a lost city. An archeologist searching for an ancient Roman city outside Vienna saw bits of brightly colored soil among worm castings. Analysis showed the bits to be from Roman frescoes. The site was excavated, and the remains of Roman buildings emerged from a thick layer of humus.
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