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What Causes You To Yawn And Why It Is Contagious? | BYJU'S Fun Facts

A mouth wide open and a massive intake of air, putting us in the mood for sleep; that’s all there is to a yawn, right? Or is there a scientific reason for yawning? Is there also a reason for how contagious a yawn is? From acting as a bodily air conditioner to showcasing emotions, a yawn has a ton of reasons behind its occurence. In this video, we dive deep into the science behind yawning and how it has baffled humankind for ages, giving us varying theories for why people yawn! 🚀 Win a NASA trip 🎓 Up to 100% Scholarship 💸 Cash Rewards 🏆 Be an All-India Rank Link: https://byjus.com/aakash-byjus-anthe2... For more such Interesting Fun Facts, Like, Share and Subscribe to BYJU'S. 👉 Subscribe to BYJU'S - http://bit.ly/2IYECcw 👉 Install the BYJU'S App - http://bit.ly/Playstore-Appstore 👉 For more interesting content - https://blog.byjus.com/the-learning-t... Video Chapters Video Chapters 0:00 - 1:12 Introduction 1:13 - 2:08 What is the cause of yawning 2:09 - 4:37 Advantages of yawning 4:38 - 5:57 Why do people yawn contagiously #Yawning #ContagiousYawning #WhyDoWeYawn #Science #Sleep #Drowsy #ScienceBehindYawning