Are Crows Smarter Than Your Seven-Year-Old?

Subscribe to our channel - http://bit.ly/ReYOUniverse How crows revealed Archimedes' principle. Why crows have been painstakingly taking revenge on a resident of India for many years. What do crows prefer - cash or bank cards? And how come that with a brain the size of a hazelnut crows are smarter than many monkeys? Crows.