New Caledonian crows reason about hidden causal agents | Science and Other Wild Affairs |

We have generally believed that animals are not capable of very complex thought, even though many species use tools and engage in other complex behaviors. This study looks at whether New Caledonian crows, that were caught just for this experiment, are capable of attributing actions to a hidden cause, when they see that possible cause come and go.

Via Sakis Koukouvis, Dr. Stefan Gruenwald