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15 remarkable animals that use tools

By: Bryan Nelson on Oct. 28, 2009, 10:09 a.m.

Photo: law_keven/Flickr

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One of the most famous tool users is the beaver. These animals construct their dams to protect themselves from predators and to provide easy access to food and gentle swimming, with some dams growing to as long as 2,790 feet. Beavers make them by cutting down trees and packing them with mud and stones.