Can a Dog Learn a Word?

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Science  11 Jun 2004:
Vol. 304, Issue 5677, pp. 1605-1606
DOI: 10.1126/science.1099899

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Language is considered a uniquely human trait. In his Perspective, Bloom discusses exciting new findings with a border collie called Rico that might challenge this view. Rico has a vocabulary of 200 words and can fetch an item according to a command from his owner. Bloom ponders whether this ability is indeed word learning akin to that of human babies.