Why is yawning contagious? Your yawn reflex, explained. | JUST CURIOUS USA TODAY 1:08 8 months ago 5 130 Скачать Далее
Why is yawning contagious? | #aumsum #kids #science #education #children It's AumSum Time 0:58 6 years ago 152 599 Скачать Далее
Why is yawning contagious? plus 4 more videos.. #aumsum #kids #science #education #children It's AumSum Time 5:13 6 years ago 68 205 Скачать Далее
What Causes You To Yawn And Why It Is Contagious? | BYJU'S Fun Facts BYJU'S 5:58 2 years ago 442 498 Скачать Далее
Why Do We Yawn? Why Is Yawning Contagious? A Doctor Explains Dr. Jen Caudle 4:08 2 years ago 2 153 Скачать Далее