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'; return $shares.$content.$newsletter; } ?> Crows’ reasoning ability rivals that of seven-year-old humans

Crows’ reasoning ability rivals that of seven-year-old humans

Crows’ reasoning ability rivals that of seven-year-old humans

New Caledonian crows are as good at reasoning as a human seven-year-old, claim researchers.

The scientists subjected six wild crows to a battery of tests designed to challenge their understanding of causal relationships. The “water displacement” tasks were all variations of an Aesop’s fable in which a thirsty crow drops stones to raise the level of water in a pitcher.

In the study, crows worked out how to obtain floating food rewards by dropping heavy objects into water-filled tubes.

They demonstrated an ability to choose objects that would sink rather than float, and solid rather than hollow objects, and they were able to choose a high water level tube over one with a low water level, and a water-filled tube over one filled with san

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