As far as I know, the purpose of yawning isn’t really understood, but it’s present in nearly all land vertebrae. Maybe it’s a universal bug in the breathing animation code.
As far as I know, the purpose of yawning isn’t really understood, but it’s present in nearly all land vertebrae. Maybe it’s a universal bug in the breathing animation code.
Many many animals yawn. Not just mammals but birds and reptiles. Even if we don’t understand fully why something happens, seeing it throughout the tree of life like that probably means there’s some reason for it.