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..Man was not the first of the creatures on earth to use a tool. There is a burrowing wasp that uses a pebble to pound the sand down over her nest. A finch that lives in the Galapagos Islands digs out insects from the crevices in tree trunks with a cactus-spine lever. The English spotted woodpecker holds open a cleft in a tree branch with a pinecone wedge. The sea otter, while floating on its back in the water, is known to place a stone on its chest, and hammer a shellfish on it, until the shell breaks open. And finally, many monkeys and apes sometimes use sticks and stones as leavers and missiles.
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