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In Depth

Aesop's fable brought to life by clever crows

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Jan. 24 - In a series of experiments, the New Caledonian crow has demonstrated an unexpected understanding of how tools work to make their lives easier. The tests by scientists in the UK and New Zealand, revealed that the bird was intelligent enough to select and use the best available tool to raise the water level in a test tube. Jim Drury reports.

In Depth

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