Source: Martinvl, via Wikimedia Commons. Play behavior can be a delicate balance between cooperation and competition. In apes and monkeys, a relaxed “play face” signals that one’s intentions are not ...
CHITWAN, Nepal -- Soccer-playing elephants used all four feet and even their trunks trying to score goals. Racing pachyderm thundered to the finish line to the cheers of the crowds. And in the ...
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