#Yawning

Yawning is considered a social behavior. While fetuses were known to yawn, scientists weren't sure if it was a self-contained reflex or if they could somehow detect cues from their moms

Scientists discovered yawns are so contagious that when a pregnant woman yawns, the fetus inside her may yawn too.

From Independent RSS Feed: Study reveals surprising benefits of yawning – and what happens if we try to resist

From Reddit - r/science: Study suggests yawning may help move cerebrospinal fluid and venous blood out of the skull, potentially playing a role in cleaning brain fluid