Are there any people on Earth who haven't got at least one item of clothes made from denim? If there are some, these people must have just thrown it away. Yes, it's impossible to imagine anyone without at least one pair of jeans nowadays as these trousers have long ago reached the top of their popularity. But do you know how old denim things are and how it all began? You will be surprised to know that the jeans we are used to now have undergone a long period of changes, so sit comfortably, your History lesson begins!