Finding the answer to one question usually led to creating several other mysteries, but scientists all over the world were working hard to explain each and every one of them. Well look no further, as we have done the dirty work for you and compiled 15 mysteries from our everyday live, that no scientists on this planet can explain to this day. Not only that scientist have not proven the exact mechanism behind a cat’s purring, they actually have no idea why do cats purr at all. Cats purr not only when you pet them, they don’t even purr only when they feel comfortable. Some have tried the simplest explanation – cats pass air through their vocal chords, and the purring sound comes to live.