>History Channel says the only possible answer is aliens.
One part of me always enjoyed those theories for the science fiction-ness of it. Some writeups i've seen about it read better than some science fiction books i've read.
The other part of me dislikes them though because it discounts the sheer human ingenuity, craftsmanship and skill that went into these things. It discounts the amazing things people are capable of and discredits our ancestors. I feel kind of the same way about the Roswell ufo tech leading to modern computers theories. They make light of the work of so many people and wave it off as being impossible without aliens.
One part of me always enjoyed those theories for the science fiction-ness of it. Some writeups i've seen about it read better than some science fiction books i've read.
The other part of me dislikes them though because it discounts the sheer human ingenuity, craftsmanship and skill that went into these things. It discounts the amazing things people are capable of and discredits our ancestors. I feel kind of the same way about the Roswell ufo tech leading to modern computers theories. They make light of the work of so many people and wave it off as being impossible without aliens.