Thousands of years ago, when human beings wandered the Earth as other predator species, something happened that changed the destiny of the Earth. Our species quietly made a great leap and crossed an imaginary line that created a before and an after.  Human beings began to create what we know today as civilization. Throughout the Twentieth Century archaeologists in different places in the world looked for places in the old world where this could have taken place, places such as Mesopotamia, China, Egypt and India, to study and discover why and how human beings were able to make this great leap. A missing link that could explain this great transformation. The oldest cities in the old world were polluted because newer civilizations had built on top of the older places. In 1994, Archaeologist Ruth Shady found that Missing Link in the Valley of Supe. Caral is now considered Heritage of Humanity and the oldest civilization in America and the central Andes.