The mystery of yawning ?!
Published 2020-07-24
What is yawning ! why we yawn and what happens when we yawn ?
#motiongraphic
#educationalvideo
Resource :
science.howstuffworks.com/life/inside-the-mind/hum…
www.healthline.com/health/why-do-we-yawn#causes
www.pbs.org/newshour/science/why-are-yawns-contagi…