Why do people catch a yawn?

seal pup having a nap

Tired? Me too. No, don’t yawn. You’ll set me off…..

As infectious yawning is only found in apes and humans, it has attracted some research dollars. Consensus seems to be settling on contagious yawning as a form of social bonding. But our hunter-gatherer ancestry means there might be more to it than simple social cohesion.
Continue reading…