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  • 2 months ago
Dolphins are highly intelligent creatures, delighting humans with their expressive faces that often appear to be smiling. Well, a new study looking at that very grin has discovered that it may in fact be a smile, one that is infectious.

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00:00Dolphins are highly intelligent creatures, delighting humans with their expressive faces
00:07that often appear to be smiling. Well, a new study looking at that very grin has discovered
00:12that it may in fact be a smile, one that is infectious. The study looked specifically at
00:17bottlenose dolphins that are currently in captivity and observed them during what researchers describe
00:21as play fighting. When a dolphin initiates the activity, researchers say it relaxes its mouth
00:26in a smile-like fashion. If the other dolphin then returns the smile, the two initiate play
00:31fighting, something which may otherwise look like aggressive behavior. While this is a really neat
00:35aspect of dolphin interactions, experts say it could have much wider implications for the entire
00:40mammalia class. The relaxed open mouth before play has been observed in several other mammal species
00:45as well, with the researchers saying this could be something ingrained in our DNA. With evolutionary
00:50biologist Elisabeth de Pelagie saying about it, the relaxed open mouth seen in social carnivores,
00:55monkeys play faces and even human laughter is a universal sign of playfulness, helping animals
01:01and us signal fun and avoid conflict.
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