The Paleolithic Era, also called Old Stone Age, has begun in different parts of the world around two million years ago and ended approximately around 12,000-8,000 years ago, transforming into Neolithic. The Paleolithic Period is divided into Lower (2.6 million-300,000 years ago), Middle (300,000-30,000 years ago) and Upper (50,000-12,000 years ago) based on the quality and type of tools and artifacts invented by the humankind. The Paleolithic Period is characterized by the appearance of primitive communal system and the transformation of the first human beings into modern physical type of humans. The Continue reading...