thumbs.pro : joshbyard: Animal Consciousness: Corvids Demonstrate a Sense of Fairness a pair of biologists at the University of Vienna trained six carrion crows and four ravens to exchange pebble tokens for food. The researchers then created same-species pairs for

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joshbyard: Animal Consciousness: Corvids Demonstrate a Sense of Fairness a pair of biologists at the University of Vienna trained six carrion crows and four ravens to exchange pebble tokens for food. The researchers then created same-species pairs for

published on: 2013-03-25 02:08:19

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