Have you ever asked yourself why do we dream?

There are many theories, but very little answers.

Some scientists believe that meanwhile we dream our brain is deciding which information captured at the day is worthless, so our brain can forget it and which information is important to remember. Also study indicates that more we learn, more do we dream.

Another theory suggests that dreams are linked with emotions. So if you are happy today your dreams will be pleasant, and if you are worried your dreams will not be as enjoyable.

Other scientist claims that dreams are meaningless, random and they don't link with times when we are awake.

What do you think?

Maybe we don't know everything, but here are some facts about dreams that we can confirm.