Our ancestors have left many traces of their presence, so archaeologists have the task to determine the origin of any discovered remains, pottery, tools and other items.

People fed on each other during the prehistoric period. On the bones of prehistoric people have been found impressions of teeth of Neanderthals and other human ancestors.

For centuries the Mayans learned how to drain wetlands, how to build irrigation and drainage systems. They were subsisting in agriculture, hunting and fishing.

Recently scientists discovered beige clay minerals in the ducts of the archaeological site Tikal in Guatemala, where in the past was the largest city in the southern lands of the Maya.