Nevermore, or Tomorrow? Ravens Can Plan Ahead - Scientific American
http://buff.ly/2ulid2k
"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...."
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