Ancient astronauts....

AAs first came to Earth many millennia ago. They were beings whose biology was similar to modern humans. They created modern mankind by mixing their genetic makeup with that of sub-humans. The purpose of mankind was to serve the AAs, principally by providing food and mining and construction labor. The AAs did not allow humans to view them – only their symbols (idols), suggesting that their appearance was frightening; however humans were occasionally permitted to see their emissaries, e.g. "geniuses" and "angels". They also would not allow humans near them, except priests who had cleansed and covered themselves and spread a germicide, suggesting their susceptibility to earthly diseases. They apparently moved about the Earth in spacecraft using chemical fuel, and only landed on mountaintops or other rocky outcroppings; this reduced the dust and provided physical protection from humans, and disease control. The earliest sites had a cave under the rock that protected the priests during the coming and going of the spacecraft. Later they built, or provided humans with tools to build, cyclopean structures – huge earthen, baked brick, or stone ceremonial platforms and pyramids, which served as landmarks and as landing and feeding sites. Since they had little defense against earthly bacteria, they developed methods to nourish themselves with the vapors emanating from food and drink which humans provided and burned for them. The food and drink was provided through the custom of sacrifice, the burning of the meat and blood of animals, and sometimes humans, which the AAs demanded. These ceremonial and feeding sites were located all over the world, most on or near the current equator or near earlier pole-shifted equators. They taught humans agriculture, astronomy, engineering, and provided the first laws. They then departed from the face of Mankind.

"Our sun is one of a 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living thing in that enormous immensity"

– Wernher Von Braun

"And it came to pass on the third day in the morning, there were thunders and lightnings, and a thick cloud upon the mount, and the voice of the trumpets exceeding loud; so that all the people that was in the camp trembled…And mount Sinai was altogether on a smoke, because the Lord descended upon it in fire; and the smoke thereof ascended as the smoke of a furnace, and the whole mount quaked greatly…And the voice of the trumpet sounded long, and waxed louder and louder…"

– Exodus 19:16-19
The following twenty clues in support of the AA theory come to mind:

The lines and figures which occur over the Earth, e.g. the Peruvian Nazca lines and "roads", the Bolivian "ceques", the radial lines emanating from ancient ceremonial sites, and the British "ley" lines, precisely straight lines which connect ancient sacred sites.

The ubiquitous pyramids of various styles scattered over the Earth, in Europe, North Africa, the Middle East, the Far East, and in North and South America. They apparently had several functions, serving as burial sites, landmarks, landing sites, bomb shelters, feeding stations, and ceremonial sites.

The megalithic constructions arrayed essentially all over the Earth; built of enormous stones weighing up to two million pounds. Why and how this was accomplished has not been adequately explained.

A unique and puzzling characteristic of the megalithic sites of both hemispheres is the complex polygonal stones which were used in their construction. Kiloton stones stacked, molded and sometimes fused together. Why and how?

The Polar Rounds, the concentration of ancient sites on or near the path of the current and shifted equators, suggesting that the ancient astronauts approached the Earth thru the solar plane , probably to use the planets for braking, and built very close to the equator. Chatelain (1988) says, "The polar rounds and the shift of the equator also explain why we have found traces of civilizations in regions of the Earth that today seem unfit for human habitation…". Remarkably many of the most mysterious sites lie on one of these ancient equators.

The many ancient writings about "gods" who could move through the air - the Enuma Elish, the Koran, the Popol Vuh, the Mahabharata, the Bible, and the voyages of the gods as depicted on cylinder seals and stellae from ancient Near Eastern civilizations.

The Heavenly Gateways - getting to and from the Earth. Before construction of the large pyramids and platforms the landing sites were simply a natural rock outcropping. A cave was excavated underneath which protected the priests during the coming and going of the Gods, or were some of them bomb shelters?, e.g.
Israel: Es-Sakhra, the sacred rock on the Temple Mount, Jerusalem. There is a cave under the rock about 24 x 18 ft, and a hole in the ceiling about 2.5 ft in diameter which permitted access to the surface (Ritmeyer, 1996).

Egypt: The Great Pyramid. The Great Pyramid was built on a huge bedrock bubble. About 115 ft under the surface, accessed via a 300 ft passageway, is an underground chamber measuring about 46 x 27 ft.

Egypt: The Step Pyramid, with an elaborate multi-chambered cave underneath, allegedly built by Imhotep.

Egypt: The pyramids of Mycerinus, Khafre, Unas, Teti and most other all had underground chambers. In fact the pyramids of Mycerinus and some others did not even have chambers in the pyramids - all chambers were underground!

Mexico: Teotihuacan. There is a cave under the Sun Pyramid with several side chambers (Tompkins, 1976).

Peru: The Torreon, Machu Picchu. A rock outcrop with a cave and altar underneath.

Peru: K’enko. A huge, rock outcrop with an altar underneath. A hole above the altar allowed food to be passed to the surface (Fig 2-1).
There are many other constructions on the Earth which seem to have served
as ancient navigation aids from the air, e.g. the Nazca lines next to the huge ceremonial site of Cahuachi, the Carnac stones and "Fairy Stone" in Brittany, the Sphinx at Giza, the Great Serpent Mound in Ohio, and the "Giant" and other huge drawings in the Chilean and Peruvian deserts.
The spiral motif was a favorite design of the ancient astronauts, appearing at sites all over the world, e.g. Brittany; Cahuachi, Peru; Chaco Canyon; Nazca, Peru; Kawhia, New Zealand; Mu’a, Tonga; New Grange, Scotland; Tarxien, Malta.

Consider this: In 1969 at New Grange, Britain, a Prof. O’Kelly proved that on the winter solstice, December 21, the morning sun would enter the passage and illuminate the spiral motif. Across the Atlantic, at Chaco Canyon, New Mexico, light falling on the spiral also was used to mark the equinoxes.

One legend has it that when we are awakening but still lightly sleeping, we might "see" one or more spirals. When this happens we are able to hear or see through the ears and eyes of someone nearby or share their thoughts (please let me know if this works!) But to be serious the spiral motif, occurring at ancient megalithic sites all over Earth, obviously had some special significance; and we now know that our galaxy has the shape of a beautiful spiral. Is that it? Is the spiral motif the signature of those who built or provided the tools to build these enigmatic sites?
They constructed on Earth reflections of their celestial abode:
Maurice Chatelain (1988) says that the pattern of the most famous cathedrals in 10 French cites "have the same configuration as the stars in the constellation of Virgo."

Bauval and Gilbert (1994) demonstrate that the Giza pyramids exactly mirror the stars in Orion’s belt on 10,540 bc.

Leviton and Coons (1987) believe that they have demonstrated the coincidence of a pattern of prehistoric sites in central Somerset with the constellation Canis Major.

Zecharia Sitchin (1990) finds a pattern in the Coricancha in Cuzco which he feels closely resembles the constellation Cygnus.
Characteristics of site selection: Identification and access from the air, security and disease control.
The important ancient sites seem to have been selected for easy identification and access from the air; on mountain peaks (Mt. Sinai, Machu Picchu, Mt. Olympus), on islands in lakes (Malta, Lake Titicaca), or on large artificial platforms (Baalbek, The Temple Mount).

In addition various sites where the gods came and went were inaccessible by most of the people of that time, on the tops of mountains or pyramids. They would not allow humans near them, except priests who had cleansed and covered themselves and spread a germicide, suggesting their susceptibility to human diseases.

Black and Green (1992) state that a sick person was considered to have sinned, that is, committed an offense against moral or divine law. The illness could be expelled or undone by a god whom the “patient” would appeal to through prayer. They write, “The use of the word 'patient' emphasizes the Babylonian view of sin as synonymous with disease. Sin could be transmitted by relatives or inherited from parents…Babylonians did not have a concept of original sin, but they believed that they were all very prone to sin.” (i.e. disease). This apparently is also the meaning of sin as used in the Old Testament.

And Jehovah said to Moses, "Go to the people and sanctify them today and tomorrow. And let them wash their clothes." (Exo 19:10).
If you read the old testament substituting “disease” or “germs” for “sin” and “sterilize” for “sanctify” you will be surprised.

And Jehovah said to Moses, "Go down, warn the people lest they break through to gaze at Jehovah, and many of them fall." (Exo 19:21).

"And also the priests, those approaching Jehovah, let them sanctify (cleanse) themselves, that Jehovah not burst forth among them." (Exo 19:22).

"And Jehovah said to him (Moses), ‘Come, go down. And you come up and Aaron with you. And let not the priests and the people break through to come up to Jehovah, lest He burst forth among them.’" (Exo 19:23).

"And if you make an altar of stone for Me, you shall not build them of cut stones. When you swing your tool on it you defile it." (Exo 20:25).
Apparently some of the gods were frightful to look at, and took great care to not be seen by humans, except possibly by the highest priests.

The feeding of large numbers of AAs by the "sacrifice" of animals, and sometimes humans.

Genetic engineering. From various ancient texts we read of the creation of mankind and "virgins" giving birth to god-kings and prophets. As our own biotechnology evolves what were unfathomable mysteries for our forefathers are now beginning to make sense.

Astronomy and mathematics. The ancient civilizations, which arose in both hemispheres near the equator, possessed an extensive knowledge of astronomy and mathematics.

The sudden appearance of a technologically advanced human civilization. John Cohane (1977) writes, "Until one arrives at Cro-Magnon man, about 30,000 bc, it is impossible to hold up a single piece of fossil evidence and say with assurance: ‘This came from an ancestor of man’." He discusses other evidence and concludes, "…and this evidence indicating that only 10,000 years ago there was a sudden and unaccountable emergence of a full-blown intelligent civilization…".

The several references to the use of nuclear or other advanced weapons during the god’s struggles with each other.

They must overcome the restraints of time, and there are several hints of gravitational time dilation when comparing the lives of the ancient astronauts with that of humans.

All of the ancient ceremonial sites, in both hemispheres, have been abandoned. In the Americas the centers came to an abrupt and unexplained end, with the exception of the Aztec centers, before the arrival of the Spaniards. Tiahuanaco in Bolivia and the entire region were abandoned by 1050 ad. The AAs had all left the Earth.

Communication with the Gods. There is the suggestion that Yahweh could only communicate with the Israelites via the Ark of the Covenant: "And the Israelites inquired of the LORD, for the ark of the covenant of God was there in those days, and Phinehas son of Eleazar, son of Aaron, ministered before it in those days, saying..."
The Israelites were instructed to blow a trumpet to signal Jehovah (probably also other AAs) to come to the sacrifice or to call God to an assembly of the tribe, or to signal for God’s assistance during battle (Numbers 10:2-10). This suggests that Yahweh could not receive the prayers of the Israelites; however other passages suggest that Yahweh could indeed receive the prayers of the Israelites if they were within earshot of the Ark. But he apparently could not reply to them via the Ark, only through the prophets within whom he had placed his ‘spirit’, e.g. when Hezekiah prayed the Lord’s answer came through Isaiah who said to Hezekiah, "So says Jehovah, the God of Israel. I have heard that which you have prayed to Me…" ( 2 Kings 19:20).

Also when David prayed to God, the answer came to David through his "seer", Gad: "And Jehovah spoke to Gad, the seer of David, saying ‘Go; and you shall speak to David, saying…’" (1 Chronicles 21:9).
Last and most important, the space colonization argument of the SETI community. The argument is that the use of nuclear propulsion at, say, 1/10th the speed of light could easily be accomplished, and that if only one advanced civilization existed in the galaxy it could colonize the galaxy in a mere 1-10 million years. They then conclude that “we don’t see them here; therefore they do not exist”.