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For those who study the development of intelligence in the animal world£¬selfawareness is an important measurement.An animal that is aware of itself has a high level of intelligence.

Awareness can be tested by studying whether the animal recognizes itself in the mirror£¬that is£¬its own reflected image.Many animals fail this exercise bitterly£¬paying little attention to the reflected image.Only humans£¬and some intelligent animals like apes and dolphins£¬have been shown to recognize that the image in the mirror is of themselves.

Now another animal has joined the club.In the Proceedings of the National Academy of Sciences£¬researchers report that an Asian elephant has passed the mirror selfreflection test.

¡°We thought that elephants were the next important animal£¬¡±said Diana Reiss of the Wildlife Conservation Society£¬an author of the study with Joshua M£®Plotnik and Fans B£®M.de Waal of Emory University.¡°With their large brains£¬¡± Reiss said£¬¡°elephants seemed like cousins to apes and dolphins.¡±

The researchers tested Happy£¬Maxine and Patty£¬three elephants at the Bronx Zoo.They put an 8footsquare mirror on a wall of the animals¡¯ play area (out of the sight of zoo visitors) and recorded what happened with cameras£¬including one built in the mirror.

The elephants used their long noses to find what was behind it£¬and to examine parts of their bodies.

Of the three£¬Happy then passed the test£¬in which a clear mark was painted on one side of her face.She could tell the mark was there by looking in the mirror£¬and she used the mirror to touch the mark with her long nose.

Diana Reiss said£¬¡°We knew elephants were intelligent£¬but now we can talk about their intelligence in a better way.¡±

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