Recently while hanging out in the G2 chat room we were discussing the issues surrounding the construction of the pyramids. While some may think the issue requires the [[google:pyramid Egypt alien|intervention of others]] we are convinced of a purely terrestrial architecture.
The issue is not really a matter of how they were built, but more about the details. What type of ramps or tools, how many men and so on. Anyway, here are some links on the topic.