{"fact":"New Caledonian crows can figure out the weight of an object just by watching it move in the wind!","context":"They also can mentally preplan\nsolutions to problems (Gruber et al. 2019) and make inferences, such as reasoning\nby exclusion (Jelbert et al. 2015) and inferring the weight of novel objects from\nobserving their movements in the wind (Jelbert et al 2019).","source":"Alex H. Taylor; Sarah Jelbert, The crow in the room: New Caledonian crows offer insight into the necessary and sufficient conditions for cumulative cultural evolution, 10.1017/s0140525x20000102","index":529}