They probably just woke up. People yawn when they wake up too.
When cats yawn they inhale a large amount of oxygen.
No many animal species also yawn, like cats, etc.
The exact reason why any animal (including humans) yawns has never been precisely determined, but many scientists think it has something to do with filling more of the lungs by taking a larger breath, in order to absorb more oxygen into the bloodstream when the body is tired (or vice versa to clear out more of the waste carbon dioxide and other unnecessary gases, so it then has more room to absorb oxygen from).
Most mammals yawn, including humans, primates, dogs, and cats. Reptiles, fish, and insects do not exhibit yawning behavior.
Cats yawn as a way to stretch their jaw muscles and increase blood flow to the brain. Yawning can also be a sign of relaxation or contentment in cats. It is a natural behavior that helps them regulate their body temperature and stay alert.
Yawning is contagious due to mirror neurons in the brain. When we see someone else yawn, these neurons are activated, triggering us to yawn as well. This phenomenon is believed to be an instinctual form of empathetic behavior.
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because your sleepy too.
Sight. If you see someone yawn you start to yawn, if you see someone smile you may start to smile to even blinking or itching can sometimes be contagious by sight.
its just to be polite nobody wanna see the inside of ur mouth
No. There's no contagious element to yawns, but they do seem to be empathetically suggestive. Many people (chimpanzees and rhesus monkeys also) yawn when they see others yawn.
Yes. Chinchillas have tongues you can see it when the yawn or drink.