bhmnscmm@lemmy.world to Today I Learned@lemmy.worldEnglish · 2 years agoTIL yawning is observed in almost all vertebrate animals and is "contagious" across species. There is no consensus on why yawning occurs.en.wikipedia.orgexternal-linkmessage-square0fedilinkarrow-up10arrow-down10cross-posted to: wikipedia@lemmy.world
arrow-up10arrow-down1external-linkTIL yawning is observed in almost all vertebrate animals and is "contagious" across species. There is no consensus on why yawning occurs.en.wikipedia.orgbhmnscmm@lemmy.world to Today I Learned@lemmy.worldEnglish · 2 years agomessage-square0fedilinkcross-posted to: wikipedia@lemmy.world