The headdress worn by Toltec Indians bore the symbol of the back of the head of a Cobra and the back of the body of a dove. This similar to the
Egyptian headdress which was the head of a Cobra and the head of a vulture.
The Olmec was a Western Hemispheric empire which were involved with the Mayan's who the Toltec conquered.
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Its apparent that the Egyptians were in the Western Hemisphere a very long time ago.
Both the Mayans, Toltec's and the Aztecs formed there empires in Mountainous regions (Gazok for the record you made an excellent find). Its very
possible that these Indian empires which had no horses or other beast of burden of equal size, used an alternative to move men and material. The Nazca
lines could easily have been map markers for a culture who traveled using balloons.
A Balloon which was well build and sturdy could have climbed to an altitude which allowed it access to the Jet stream (its cabin would also have to be
pressurized but reason exist to consider that new how to do this as well). From Mexico the Jet Stream would take them to the Mediterranean and the
trip back would allow them to pass over the Nazca lines.
There are other issues in respect to this matter with regard to boats, specifically all of the European and African cultures for a time considered the
horizon to be the point at which heaven and earth touched, so when a person was considered to be dead they would place them on a well constructed boat
(the Orientals still engage to some extent in this practice) and set them off to sea. Not all those prepared this way were actually dead and the boats
were so well constructed they were able to cross the Atlantic in good condition.