I'll start with this...

"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

Let's discuss...

"Mythology is the study of whatever religious or heroic legends are so foreign to a student’s experience that he cannot believe them to be true; hence the English adjective ‘mythical’ meaning ‘incredible’; hence the omission from standard European mythologies of all Biblical narrative even when closely paralleled by myths from Persia, Babylonia, Egypt and Greece."

- Robert Graves (Graves 1968)

For many modern skeptics the world’s oldest writings, on clay, stone and papyrus, is simply myth. However, if we dismiss all of the ancient literature and inscriptions - the Bible, the Koran, the Mahabharata, and the thousands of clay tablets from Mesopotamia - as too incredible to believe, we would still have to deal with the question of the physical evidence. Who built the ancient megalithic structures? How were they built? Why the practice of building pyramids at ancient sites all over Earth for a period or time, and then suddenly abandon them? Who marked the Earth’s surface with gigantic lines and figures? Who created the astonishing artwork on Mars? Why and how were these things done? In this space age, with it’s remarkable technological advances, it is becoming apparent that the "miracles", and other seemingly supernatural events reported in ancient texts, the megalithic constructions, and the enigmatic lines and artwork over the Earth, resulted from an advanced technology which was incomprehensible and indescribable by the ancient human observers. On these pages we take the position that there is a reasonable explanation, within natural law, for these mysteries.

In this series of articles we will review the evidence that these mysteries are attributable to ancient astronauts; extraterrestrials who have visited Earth in prehistoric and historical times, and have interacted with humans or their evolutionary predecessors, i.e. what authors throughout history have referred to as "the gods".
Most authors, with the exception of Zecharia Sitchin (1976), who write about ancient astronauts, take us to familiar sites around the world where we get a "how-could-they-have-done-that?" feeling, but do not get into details concerning the god’s technology, motivation, or their whereabouts.
By contrast, in these pages I attempt to touch on the following questions:

What was the nature of the gods?
How did they accomplish their seemingly miraculous feats?
What did they value?
What was their connection to humans?
Where did they come from and where did they go?

How can one not wonder what was going on all over the world... To believe what history tells me, it is the equivalent of me going in the backyard and constructing a mega structure to stand the test of time from scratch without any modern tools or machinery..

I believe it is like everything in life..
like everything in the universe..
you only get what you need..
so obviously right now, we still need to be alone.. I wonder why that is?

How did ancient astronomers know of planets that exist that can only be seen in modern-day with the most advanced telescopes?

you mean,that ancient Astronaut Hypothesis!
It's still far away from a Theory!

The AA Hypothesis in Brief..

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.


We can also talk about what supports it becoming a theory

"The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypothesis or axioms"

– Albert Einstein

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.
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”. The following section examines this clue in greater depth.

Have you ever wondered that if David was a man after God's own heart, why David needed a seer? Seems to me that David would have had direct contact, since Gad was never mentioned as being someone after God's own heart! Who do you really think God was speaking to? Does this mean that even people who are after God's own heart, cannot have direct contact with Him? Something to think about!

Very interesting point Missy, seems like there would be more significance placed on the seer verses the Third party David whom carried the message of the seer whom obtained the knowledge through an extraterrestrial source.. At the time, mans knowledge bank and vocabulary was limited versus today's and the way it was all interpreted and translated was limited to knowledge and vocabulary of that time as well as images they could relate to... How can the same bird-like man be depicted in images all around the world during the same time frame with such limited resources of the time?

“This, then is the paradox: all our logic, all our anti-isocentrism, assures us that we are not unique – that they must be there. And yet we do not see them!”

– David Viewing

Physicist Enrico Fermi once asked: "If there are extraterrestrials, where are they?"
"If they existed," he said, "they would be here." It was a casual question over lunch, and I suspect that if he had thought further about it he might have further speculated, “or have they been here and have left?” We’ll never know, but his question, which became known as the “Fermi Paradox” or “Space Travel Argument”, raised a great deal of discussion in the SETI community.

The paradox lead a few scientists - Freeman Dyson, Michael Hart, David Viewing and Frank Tipler among others - to speculate that any older technologically advanced civilization would have colonized the galaxy by now, and since they are not here, they don’t exist; therefore “SETI is a waist of time and money”.

The “space colonization” proponents argue 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”. The argument apparently assumed that the alien’s would physically occupy all the habitable planets rather than just develop them. I think this was where they got off track.

Others have countered. Kuiper and Morris (1977) stated, “The search for extraterrestrial intelligence should begin by assuming that the galaxy has been colonized”. The paper was more wild speculation but the positions and titles of the authors, and a few equations, were apparently enough to get it into the journal Science.

But there is another reason we should assume that it has already been "colonized". In a recent paper astronomer Dr Charles Lineweaver (2001), studying the tricky business of terrestrial planet formation, argues that "...this gives us an age distribution for life on such planets and a rare clue about how we compare with other life that might inhabit the Universe." From the age distribution he then concludes, "most of the life forms in the universe have had two billion years longer to evolve than we have." Apparently we're the new kid on the block.

As used here "Colonization" is probably a misnomer, since in our case the ancient astronauts goal seemed to be the extension of their biology, knowledge, laws, and technology, by example or by physical manipulation of the biological blueprint of the most promising animal they found here; sort of a galactic migration of intelligence, survival traits and culture, rather then physical beings. It appears that when we attained a certain technological level they got out of the way.

My thought here is that their argument is forceful but their conclusion is incorrect. It is in fact a powerful statement in support of the AA hypothesis - that the Earth, probably along with most habitable bodies in the galaxy, has indeed been colonized by ancient astronauts and, at least in part, we are them! Curiously, to my knowledge, none of the AA authors have appreciated the compelling logic of this argument and the strong corroboration it gives to the AA theory.

I always figured that if aliens exist they are likely an advanced civilization...With this in mind, I also venture the assumption that any advanced civilization's goal would be peace, and in that any alien advanced civilization out there would likely not bother with our otherwise war-torn and plague-ridden planet.

It lacks logic.

That's the whole idea though, they only passed through and thus guided man on a pathway towards peace... What all happened that we know about, all around the same time period, all over the world lacks logic too...

What intelligent species would possibly want to put up with our crap?

Perhaps that's why they got the hell out of here?

The tremendous lack of any physical or lasting evidence severely hurts this argument. It is explained by science, mostly, aside for a few odd things here and there in history pretty much everything has been explained.

It is my idea that most people who speak about ancient aliens don't really know a whole lot about ancient civilizations or how they operated, what they were capable of, and how a lot of it was achieved...Which is why we get aliens. Because if everything else fails, it had to be aliens.

lmao oh my goodness really ... I love history way before BC...
but seems like they where fighting battles back then to ... and then Atlantis and other places where myths where brought out from ... and formed becouse of ... and what it was like back then as I believe can only be speculated ... but some really knowledgeable people came from that time as well ...

I think there is some confusion as to what a theory is. A scientific theory is one that comes about after years of study and testing, after gathering evidence thought o even relate to alien travel, then re-testing, and then it is analyzed after publication by the rest of the scientific community. After they have followed the same model used in the research, with most if not all coming to the same conclusions, it may be elevated to the highest conceptual form in science, otherwise known as a "theory". There is no evidence that we have ever been visited by extraterrestrial life forms, nor is there any evidence that we have found any life on other planets. Why? All planets large enuogh to hold diverse life do not have the atmosphere or enough water, plus heat conduction, to support life at all at this time. Did they in ancient times? No, or there would have been evidence left by their visitation and all the things unethical scientists are stating "MUST" have come from aliens are voiced from confirmation bias or an argument from ignorance, so they don't work. Plus, a species so advanced that they managed to get here from galaxies away would not have left pictograms behind to prove they had been here, which is the latest biased concluson made by so-called theorists. COULD there be extraterrestrial lifeforms in other galaxies beyond what our telescopes and viewing equipment have picked up? Hell, yes. Is there now? Not so far as we know. Is it fun to think about? Only if you plan for a very hot lifestyle on a place such as Mars, or a very cold one on a place such as Jupiter. With almost no atmoshpere, no air, and no computer geeks to help you when your WIFI crashes. I'll take the red pill, please.

Ok .. Sooo .. this .. only just now .. ocurred to you ... ? / ?

Your facts are a little "confused". Perhaps if you added the words "that I am aware of" to several of your sentences above. What may be evidence to others may not be within your realm of experience.

Some very good theories did not take years to form. Aliens may not have needed to travel from "galaxies away". Our own galaxy has lots of planets and is a lot closer to us.

Aliens may not have left pictograms but they may have left DNA.