I am new to the forum, (this is my first post), but Lemming.... Consider slave labor. Yes, I concede that it was a architectural feat to gather the men and materials... However, the Egyptians we obviously very well versed in the building of pyramids (there are smaller versions of burial tombs like Great Pyramids of Giza dotted round Egypt). The ancient Egyptians, who, like any engineer/architect, had the building of the pyramids down to the finest detail, coupled with prior knowledge of how to build them and slave labor could make the pyramids. You get enough men together you can move very large objects and if you whip them enough, you can move the object long distances....
Yes, humans today may not be able to build the pyramids on the scale that they did back then... First, would you want to? I certainly would not want to spend years of my life trying (because the pyramids took a LONG time to build). Plus, we don't have the experience.. back in those time I am sure there was a 'head architect' that had prior knowledge of how to go about building a pyramid... we just have very limited records on how they did it. I am sure we could make something like it, but it would have our own spin on it. And second, we do pretty good on the technological marvels nowadays. You can take 20-50 guys and put up a skyscraper ANYWHERE in a matter of months. Yes, we have technology to help us, but we made the technology. Heck, the materials that a skyscraper is made of is more advanced then a big rock in the middle of a desert.
Secondly, you ask how could they still be standing? Well the pyramids are essentially one BIG rock, a mountain if you will. Its not like the pyramids have huge caverns or open spaces, they are a maze of tunnels and small rooms. So, just like a mountain (which can have caves in it e.g limestone caves) can stand for thousands of years, so can the pyramids. They will just be a little weathered/eroded.
Third, you ask why is there no road to the pyramids? Well you said it yourself, the desert is ever changing. Perhaps there was once a road, but roads (as demonstrated by the amount of potholes in all the ones I drive) don't normally last long. Also, since the pyramids were of obvious significance, the Egyptian may not have wanted just anyone showing up (eg grave robbers) so they could've pulled up any road that was there.... Just things to consider.
And lastly, the Great Pyramids are not singular in their existence... there are the pyramids the Aztecs/Mayans? in Central America. So there are two 'advanced' civilizations existing at different points in time? At other points in time, do you believe humans have devolved, just because we didn't think it was worth the energy and effort to build a massive monument to the dead?
Also, could you post the link or the information about this bottle you keep referring to? I tried to look it up on the Web to get the details, but I couldn't find anything.
Thanks
-obsidian