{"fact":"Crows can plan ahead, mentally simulating the steps needed to achieve a goal, even when they can't see all parts of the problem at once.","context":"The authors reason that the crow plans ahead because it can only see one side of the cubic setup at a time. Hence, the crow must mentally simulate the future steps.","source":"Manfred Eppe; Christian Gumbsch; Matthias Kerzel; Phuong D. H. Nguyen; Martin V. Butz; Stefan Wermter, Intelligent problem-solving as integrated hierarchical reinforcement learning, 10.1038/s42256-021-00433-9","index":648}