Discovered in 1901 in the Mediterranean Sea, the Antikythera Mechanism is one of the most puzzling artifacts today. Now on display at the Athens National Archaeological Museum, it has been dated from the 1st C. BCE and its function determined to be a mechanical computer for the computation of celestial movements of the zodiacal bodies (Sun, Moon, Planets). Made of bronze, it contains over 30 gears in a complex architecture that rivals later medieval clocks produced a thousand years later. The main gear wheel is in sync with one solar year and works as a mechanical planetarium. This artifact is of Greek origin: the fruit of technology lost to the world for a time in a cataclysmic event long ago.
The pre-historic world, or, mankind that existed before the birth of society in the area of ancient Egypt and surrounding nations, consisted of peoples in various stages of advancement. Like the modern world, where primitives view advanced people as gods, the ancients had nations of super power along with subservient nations. There was one superpower consisting of a group of nations that possessed the most advanced knowledge and technologies. That nation had met its end as its main continent sank (you know the name, weather you believe it or not), but there were many survivors who had migrated to and passed the knowledge to peoples of other locations: Mediterranean, Meso-America, Egypt, parts of China. Much of this ancient knowledge (mainly consisting of philosophy) exists today in a few select secret mystery schools.
Another informative link: the Antikythera Mechanism Research Project.
Antikythera mechanism. (2011). In Encyclopædia Britannica. Retrieved from http://www.britannica.com/EBchecked/topic/1334586/Antikythera-mechanism