The term worm is used in everyday language to describe many different distantly related animals that usually have a long cylindrical tube-like body and no legs. Worms vary in size from small to over 1 metre (3.3 feet) in length for marine polychaete worms (bristle worms), 6.7 metres (22 ft) for the African giant earthworm, [ ]
http://worldgeographicchannel.com/the-super-worms-how-worms-are-being-used-to-cure-diseases-a-documentary-film/
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