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9 of the smartest animals on Earth

close-up of raven

Photo: Jupiterimages

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Ravens are more than the subject of dark themes by writer Edgar Allen Poe. They are also extremely resourceful animals that have been known to multi-task. Researchers from Canada and Scotland have shown that ravens use logic to understand their surroundings in a way that may surpass the ability of the great apes. The crow, a close cousin to the raven, is also an extremely smart bird.