“What confounds this dilemma further is that individual animals within a species have varying cognitive abilities. To quote the Yosemite National Park ranger who, when asked why it was proving so hard to make a garbage bin that bears couldn’t break into, said, “There is considerable overlap between the intelligence of the smartest bears and the dumbest tourists.” HumourAnimal Intelligence Book:How to Speak Whale: The Power and Wonder of Listening to Animals Source: How to Speak Whale: The Power and Wonder of Listening to Animals