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Nevermore, or Tomorrow? Ravens Can Plan Ahead - Scientific American

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" We have long known that ravens are no birdbrains. They have been spotted caching food for later,  gathering string  to pull up hanging food and even trying to deceive one another. A  study  published today in  Science  adds an especially impressive twist: Ravens can plan for future needs that they never encounter in nature, suggesting intelligence may arise predictably from conditions that occurred multiple times across the tree of life. ..." http://buff.ly/2ulid2k via Buffer