Hi, civilization in the past is a scientific study and we can study many different of them. More elder is a civilization the study of that is more depending on the evidence and is more exciting. Because it back to earlier kinds of human and civilization. Among many civilization in the world Egypt is one of the eldest and one of the greatest and also one of the mysterious one. Specially pyramids are mysterious because they are made of huge stone which it is not expected to be transported by human. It is probable that they are made by slaves, and pyramids had some religion base, as tomb.