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Originally posted by outsider
Cool theory, but I think they pretty much know what they are all about - at least the main ones. Could be other uses besides tombs that we are not aware of, but just not enough room inside for a bomb shelter - unless it's just for a few people.
1.Time capsule hypothesis
2. Phrophecy in stone hypothesis
4. Machine or Power Plant hypothesis
5.The Weapon hypothesis
Originally posted by ultra_phoenix
A direct hit, with a 10 KT tactical nuke , will blow away this so-called shelter. So it can't be a good theory. But I have to admit it , it's a cool dream.
Originally posted by Byrd
[I've met Pratchett at a few science fiction conventions. He'll be the first to tell you that he made that up.
Note that the ancient artifacts left were all made out of stone.They had to use something like a maser to cut granite,it was too hard for anything else.