alt Hacker NewsIt's a bit like laughing. Synchronise the mood of the group. I assume other mammals have contagious yawns too?
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wjb3 • yesterday at 9:34 PM
I think you're onto something here. Does anyone know if there are examples of very non-social species yawning (i.e., something that has a brief mating period with no prolonged pair bonding, and then it lays eggs and takes off)?
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Cats certainly do.
Strangely, dogs sneeze to show deference.