2006-11-10 03:04:52 · 7 answers · asked by Amane 1 in Science & Mathematics ➔ Biology
It's a sympathetic reaction that makes them contagious. A yawn happens when your body is not receiving enough oxygen. You yawn when someone else yawns because of this sympathetic reaction. Mythbusters did an experiment on this topic on one of their shows.
2006-11-10 03:09:45 · answer #1 · answered by quatrapiller 6 · 1⤊ 0⤋
A yawn is a way of getting more oxygen to the brain, when you see someone yawn your sub-conscience interprets this as oxygen running out and so you begin to yawn as well.
2006-11-10 03:11:12 · answer #2 · answered by Anonymous · 1⤊ 0⤋
I yawned just reading the question. My oxygen levels must have been going low because Ive been on here for an hour, my breathing becoming shallower.
2006-11-10 04:22:37 · answer #3 · answered by Old Man of Coniston!. 5 · 0⤊ 0⤋
you do not yawn because you are tired..its because you need more air in your lungs..usually in a hot room everyone will yawn.
2006-11-10 03:14:50 · answer #4 · answered by grumpcookie 6 · 0⤊ 1⤋
The simple yet powerful persuasion of suggestion.....
2006-11-10 03:13:05 · answer #5 · answered by Orion B 3 · 0⤊ 1⤋
I would answer but you have spelt contagious wrong!
2006-11-10 07:24:41 · answer #6 · answered by Anonymous · 0⤊ 1⤋
YES for hundredth time and i hope this is last time this question is asked.
2006-11-10 03:14:35 · answer #7 · answered by Anonymous · 0⤊ 2⤋