That question has been brought up by many fringe authors, and it is an interesting one. I like to add to it: Why did the ancient Americans have toy wheels and not use the wheel for transporting themselves?

There are some who state a much older civilization existed over 12,000 years ago but was wiped out by a series of comets which caused a catastrophic flood. Then there are those who state we got a boost from extraterrestrials visiting us. I have pondered the possibility that they are both right: Extraterrestrial visitation and an ancient civilization.

The ancient civilization had been in contact with extraterrestrials from many different areas such as Sirius, Cygnus and the Pleiades. (Those are where most of the ancient religions focus on.) When the comets hit, it was devastating to the world and the civilization. The extraterrestrials came to visit and restart our civilization. The problem may have been they just memorized and did not learn anything.

This is just an idea that is based on the many ideas floating out there.

I was studying for an archeology exam this evening and noted that the current conventional Egyptologist view is that the Great Pyramid was built in 20 years by 84,000 people working 80 days per year. According to this view, these people set the 2,300,000 blocks of the pyramid, which averaged 2.5 tons each, in that time. According to my math, that means that the blocks had to be set at a rate of 60.104 seconds per block, if the builders worked 24 hours per day. I don't think this is even possible for beings with vastly superior technology.

I'd be really interested in reading any of your comments on this. Thanks.

Many theories range from them taking one hundred years to complete, to just a few years. Use of slaves was thought to build them earlier, but now the thinking is that these projects were too important to have lowly slaves build them.

Who built these marvels, and how is a very interesting question. There is a suggestion that the ancient Egyptians knew how to use levitation or other ways to move these monstrous blocks.

My main point is they had all this great knowledge and skill very briefly and then started to go down hill rather quickly. Why are future monuments not as grand? Why were the Greeks and Romans less technical with their building skills and knowledge?

Were the retaught the old knowledge and then were helped with building the pyramids to show how it worked? To only have a few keep the relearned ancient knowledge for themselves?

Even today, there is not a clear theory as to how they were able to build these pyramids so precisely.

5000 years ago, human kind had great knowledge. That knowledge slowly deteriorated through the centuries until we hit bottom during the Dark Ages. My question is why? Learning and techniques should of improved, not gone down hill.