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JumpCrisscross
on Jan 10, 2022
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UCLA Study Finds Laughter in 65 Species, from Rats...
So in summary: primates, social mammals, domesticated mammals and vocal bird species?
marcosdumay
on Jan 10, 2022
[–]
That short list is just social mammals and social birds. But I can't say if this is not selection bias from the researchers.
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