Purring

No one knows exactly how cats purr. All we know is that it comes from deep inside a the chest. I think it has a little extra thing on their vocal cord that vibrates when the cat needs it. Cats are able to meow and other things while purring, so I think that there is a something inside their chest that, first, makes scientists believe that there is something in the chest that makes a cat purr, and second, has a little tube or something that makes a cat able to meow while purring. That's only what the research I did on my cat concluded to. No one really knows for sure, bu scientists are trying to figure it out. We definitely know that purring is used to comfort the cat and to show a sign of happiness. :)