Luis and Angelo discuss the theory of how ancient civilizations were able to accomplish stunning technological achievements with the possible help of extraterrestrial visitors equipped with anti-gravity technology and other worldly machinery.  Learn how ancient civilizations may have observed alien spacecraft that gave them knowledge of modern aerodynamics and flight more than 1,500 years prior to its discovery.  And learn how from ancient Egypt to South America, pyramids, temples and other structures were built moving and lifting stones into place, some weighing thousands of tons, with a precision so advanced that engineers today may find it impossible to replicate even using modern heavy equipment and computer systems.