| why do we yawn brain | 0.23 | 0.2 | 7731 | 20 | 86 |
| why do we yawn when we see | 1.68 | 0.7 | 9437 | 26 | 81 |
| how does yawning affect the brain | 1.66 | 0.6 | 3849 | 33 | 36 |
| why do humans yawn | 1.33 | 0.3 | 1555 | 18 | 67 |
| why do we yawn scientifically | 1.36 | 0.6 | 7550 | 29 | 34 |
| google why do we yawn | 0.2 | 1 | 6562 | 21 | 74 |
| why do humans yawn when others yawn | 1.75 | 0.8 | 6688 | 35 | 28 |
| why do i yawn when nervous | 1.15 | 0.9 | 7032 | 26 | 74 |
| why do neuro patients yawn | 0.51 | 0.9 | 8817 | 26 | 53 |
| do scientists know why people yawn | 1.02 | 0.3 | 617 | 34 | 88 |
| why we yawn reasons | 0.74 | 0.3 | 8781 | 19 | 60 |
| reason why we yawn | 1.26 | 0.3 | 1814 | 18 | 84 |
| does yawning cool the brain | 0.05 | 0.8 | 2793 | 27 | 54 |
| why does the human body yawn | 1.88 | 0.6 | 7974 | 28 | 12 |
| why do people yawn | 1.55 | 1 | 1314 | 18 | 74 |
| why does our body yawn | 0.18 | 0.2 | 5986 | 22 | 61 |
| yawning oxygen to brain | 1.88 | 0.9 | 242 | 23 | 84 |
| reasons why people yawn | 0.72 | 0.3 | 6533 | 23 | 57 |
| does yawning mean your brain needs oxygen | 1.85 | 0.8 | 465 | 41 | 40 |
