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‘smile’ at each other when they play and to avoid misunderstanding, study finds | CNN", "rectangle": [ 4, 72, 1916, 1036 ], "class_name": "Document", "type": [ "Click", "rightClick" ], "depth": "1-25" }, { "name": "Open Menu Icon", "rectangle": [ 264, 76, 289, 108 ], "class_name": "Button", "type": [ "Click", "rightClick" ], "depth": "1-30" }, { "name": "CNN logo", "rectangle": [ 312, 72, 353, 112 ], "class_name": "Hyperlink", "type": [ "Click", "rightClick" ], "depth": "1-31" }, { "name": "Science", "rectangle": [ 352, 72, 427, 112 ], "class_name": "Hyperlink", "type": [ "Click", "rightClick" ], "depth": "1-32" }, { "name": "“Should we really just interpret it as an exchange of open mouths that are occurring between two individuals to communicate ‘hey, we’re on the same page,’” she added. “… Does that necessarily mean that because it’s play, it’s pleasurable and therefore you and I are smiling at one another like a human or a chimpanzee might … I’m not sure I’m ready to take that next step.”", "rectangle": [ 444, 91, 1114, 219 ], "class_name": "Static", "type": [ "Click", "rightClick" ], "depth": "1-42" }, { "name": "Space", "rectangle": [ 450, 72, 496, 112 ], "class_name": "Hyperlink", "type": [ "Click", "rightClick" ], "depth": "1-33" }, { "name": "Advertisement", "rectangle": [ 467, 74, 1438, 324 ], "class_name": "Document", "type": [ "Click", "rightClick" ], "depth": "1-26" }, { "name": "advertisement", "rectangle": [ 467, 74, 1438, 324 ], "class_name": "Document", "type": [ "Click", "rightClick" ], "depth": "1-27" }, { "name": "To get missing image descriptions, open the context menu.", "rectangle": [ 467, 74, 1438, 324 ], "class_name": "Image", "type": [ "Click", "rightClick" ], "depth": "1-28" }, { "name": "Life", "rectangle": [ 519, 72, 545, 112 ], "class_name": "Hyperlink", "type": [ "Click", "rightClick" ], "depth": "1-34" }, { "name": "Unearthed", "rectangle": [ 568, 72, 644, 112 ], "class_name": "Hyperlink", "type": [ "Click", "rightClick" ], "depth": 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They have many different ways of playing together, like leaping, breaching or flipping above the water, striking the water surface with their tail flukes, play-fighting or surfing through the waves.", "rectangle": [ 444, 816, 1116, 918 ], "class_name": "Static", "type": [ "Click", "rightClick" ], "depth": "1-45" } ], [ { "name": "But despite dolphins’ playful reputation, their facial expressions during play had never been investigated before, though studies have established that other mammals, like humans and monkeys, communicate with open-mouthed, smile-like expressions when playing. Scientists widely believe this behavior derives from a modified biting action without the actual contact, the study said.", "rectangle": [ 444, 936, 1118, 1040 ], "class_name": "Static", "type": [ "Click", "rightClick" ], "depth": "1-46" } ], [ { "name": "Advertisement", "rectangle": [ 1340, 1031, 1641, 1040 ], "class_name": "Document", "type": [ "Click", "rightClick" ], "depth": "1-50" } ] ] } ] }