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Atlantis was a great continent. Plato wrote about it as early as 360 B.C. Timaeus is one of two books that he had written, Critias his second book he was unable to complete; it is not clear to as why.
Other then these two written Manuscripts, there appears to be no other primary ancient account of Atlantis. All that write about Atlantis have had to at one time or another refer back to Plato's manuscripts, being that they are the only recordings of such an event.
In the artist drawn below is the city of Atlantis. It is a very impressive likeness to that of the real Atlantis as I have seen it to be in my mind so I felt it has earned its rightful place in this my theory on Atlantis. Many have had dreams and past life experiences that point to their living in this great city. A city that appeared to have vanished beneath the sea in what some say was a great earthquake. Others say it was an explosion of tremendous force; originating from the great city's center, that caused it to sink beneath the sea.

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Some of the ancient philosophers viewed Atlantis as fiction including Aristole. However, in antiquity there also many that did believe in its existence and they too were historians, geographers and philosophers.
Even some of the great thinkers of our time have theorized that Plato's writings concerning the lost continent of Atlantis were nothing more then the work of fiction to fuel his political career.
However, Evidence does exist that points to the reality that such a great continent and city did indeed at one time exist. Some of the relics and ruins that lay beneath the sea point to this.
Another fascinating discovery discovered at the Maya ruins at Coba, is a tablet with pictures that describe an escape from a cataclysm depicted by exploding volcanoes and collapsing temples.

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The Maya legends state that their ancestors came from a great land in the Eastern Sea; it was destroyed by a great cataclysm and sank beneath the ocean. The Amer Indian traditions refer to this land as Azthan or Atlan and other similar names that, not-surprisingly, sound very much like Atlantis.
The crystal pyramids of Atlantis another interesting thought to ponder.
Could subterranean crystal pyramids power Atlantis? I believe so. We use crystals in almost everything electronic we build today, such as watches, instruments and even our computers.
Crystals are enhancer's of energy; they store energy as well. Just think where humanity might be now if they had taken an interest in exploring the possibilities of using crystal technology instead of wasting our natural resources.

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There are even Egyptian Hieroglyphics with ties to Atlantis. They speak of flying air ships such as these below.

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They also tell of those that came from the sky in machines that harnessed great destructive power and referred to them as the ancient astronauts. Theories about Atlantis have often linked sightings of ancient astronauts to the Atlantean space ships.
Atlantis is said to have been bigger then the North America Continent and was diminished twice by earthquakes and volcanic eruptions and destroyed a third time by a world War Three. This war is said, to be the direct confrontations of warring races that settled on the planet from off world destinations.
This is another interesting point to ponder in that it opens the door to many theories such as the one I bring before you the reader now. It is my strong belief that Atlantis was a physical portal through which off world races were allowed to enter.

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The planet has many portals scattered all over it but the main doorway to our world was Atlantis and through this passage, other alien races could emerge easily as long as it was to remain open. The remaining portals fanned out from the Great City Atlantis much like that of a spider's web. Atlantis was the Jewel of all the portals the controlling center piece to which all other portal were connected.
The ancient dwellers of Atlantis realized that the ongoing warring between the off world visitors would eventually interfere with the normal development of our race. It was beginning to show early in our development as man began to incorporate the ancient technological advancements that the Atlantean and other off world dwellers had brought with them. We were as young children playing with dangerous toys that might well have destroyed us if not brought into check.

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The image above was believed to be that of a huge light bulb constructed by the ancient Egyptians but later disputed by some other researchers claiming it to be part of a magical belief practiced by the priest of that area. I however feel it is the early development of the light bulb.