The pyramids (and temples) in Egypt were built by the agricultural labourers, during the time of the Nile floods, as a form of 'National Service' (in their belief that their pharaoh would enter the realm of the gods, and thus ensure their place in the afterlife, the pyramids were seen as 'resurrection machines'; also, that their building such would gain favour with the gods, so as to ensure bountiful harvests).
Stonehenge - in my country, Britain - was built by the worshippers of the Pagan gods, and used by the Druids as a kind of solar/lunar calendar/clock, to indicate the Spring/Summer Equinoxes, and Beltane/Samhain; also Winter Solstice, as part of 'Earth Goddess' worship.
The Moai were carved & transported by the people of Rapa Nui, as part of their Ancestor Worship beliefs; at a time of inter-tribal strife, over natural resources. Which, ironically, via their cutting down trees for the purpose of transporting & erecting said Moai, accelerated this civilisation's demise.
PROTIP: The film "Stargate" is not a documentary. The books by Erich von Daniken were discredited decades ago. And the Rapanuians did not possess foresight in trying to advertise their creations then, to Konami* in the future, for use in their "Nemesis"/"Salamander"/"Gradius" shmup arcade videogames.
And the notion that Earth was seeded/genetically manipulated/evolutionally accelerated via extraterrestrials is purely in the realms of Sci-Fi. The film "2001: A Space Odyssey", TV series "Babylon 5" (humans altered by the Vorlons to create telepaths for use against the Shadows), and the anime series "Stratos 4" (it's "X-Files"-esque aspects, with a sentient space-borne 'virus' travelling to Earth via the comets/meteorites; this series' more benevolent version of the 'Cigarette Smoking Man' etc) and many more mentions in books/TV/film etc are just that: Fiction.
This dickhead had better not watch the film "Alien vs. Predator" then. The concept of the Mayan, Egyptian & Cambodian pyramids - and their similarity, despite their geographical/architectural/cultural disparity - being as a result of the Yautja (Predators) teaching ancient human civilisations how to build such (as the Yautja were regarded as gods) would cook this tinfoil (ass)hatter's brain under all that aluminium more surely than a roasted turkey.
*- I'm just surprised livin_in_another_dimension here didn't mention the Nazca Lines; Thor Heyerdahl, and all that jazz. Seeing as they featured in the Namco/Atari arcade game "Xevious" (and the unreleased 3D sequel "Solvalou"). [/MAME]
