Many people say they yawn because they are bored or tired. That might be true. People do often yawn before they sleep and after they wake up. However, we know that people also yawn when they are excited or nervous. Olympic runners, for example, often yawn before a race. Why is that?
There are about 20 reasons( 原因) that scientists think are possible for yawn yawning after research. They do not know very well why yawning happens, but they do know many facts about yawning.We know that everyone yawns in the same way. First you open your mouth slowly. Your mouth stays...
Likely Reasons Dogs Yawn When You Pet Them The How and Why of Canine Yawning Yawning certainly is not something out of the ordinary if you have a dog. However, you may wonder why it seems to occur more often when you pet them. What purpose or, more correctly, purposes does yawning serv...
Many people say they yawn because they are bored or tired. That might be true. People do often yawn before they sleep and after they wake up. However, we know that people also yawn when they are excited or nervous. Olympic runners, for example, often yawn before a race. Why is that?
Many people say they yawn because they are bored or tired. That might be true. People do often yawn before they sleep and after they wake up. However, we know that people also yawn when they are excited or nervous. Olympic runners, for example, often yawn before a race. Why is that?
③Many people say they yawn because they are bored or tired.That might be true.People do often yawn before they sleep and after they wake up.However,we know that people also yawn when they are excited or nervous.Olympic runners,for example,often yawn before a race.Why is that?In 2007,...
However, we know that people also yawn when they are excited or nervous. Olympic runners, for example, often yawn before a race. Why is that? In 2007, scientists found that a yawn can help a warm brain cool down.Some scientists believe that yawning makes you notice things more quickly. ...
Many people say they yawn because they are bored or tired. That might be true. People do often yawn before they sleep and after they wake up. However, we know that people also yawn when they are excited or nervous. Olympic runners, for example, scientists found that a yawn can help a...
Many people say they yawn because they are bored or tired.That might be true.People do often yawn before they sleep and after they wake up.However,we know that people also yawn where they are excited or nervous.Olympic runners,for example,often yawn before a race.Why is that?In 2007,sci...
See why half a million people are flocking to the Vatican 01:31 CNN — There’s a reason Asian tourists regularly rank Seoul, the capital of South Korea, as their favorite world city. Actually, there are 50 of them and possibly many, many more. Come with us as we take the Korean...