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Researchers banned pencils from a lab just to see what these rare crows would do next

Researchers Banned Pencils From a Lab Just to See What These Rare Crows Would Do Next ...
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11 Things Crows Can Do That Most Five-Year-Old Children Can’t

Crows' intelligence is truly impressive. Research by Corina Logan of UC Santa Barbara and collaborators at the University of Auckland in New Zealand shows how New Caledonian crows meet and beat ...