Hi, there are many researchers and studies about Egypt and its civilization. Pyramid construction are very stable which from thousands of years BC till now yet they are safe. They are made of huge stones and there are many mystery about them. One of the mysteries is about how they are built. They are made of giant stones and it is hard to think that they are carried and transported by human so that some theories are about alien help for building these pyramids but there is no evidence to prove this theory. Let's watch the video about pyramid construction in Ancient Egypt.