{"fact":"While crows understand basic cause-and-effect with tools, they're not physicists! They can be tricked by setups with counterintuitive mechanisms, like a U-shaped tube where dropping a stone in one arm raises the water level in another, unconnected tube.","context":"Like the jays, the New Caledonian crows failed the more challenging task that required them to attend to the counter-intuitive causal cues in a U-shaped apparatus ... suggesting that the jays and New Caledonian crows possess a sophisticated, but incomplete, understanding of the causal properties of displacement.","source":"Nicola S. Clayton, EPS Mid-Career Award 2013: Ways of thinking: From crows to children and back again, 10.1080/17470218.2014.943673","index":305}