Known as the stone age, humans started to be used as tools or equipment and weapons. Archaeologists determined that the stone age of pre-historic man (Universal) is between 2.5 million years ago to approximately 4000 years ago.
Is known of the rock era, man began to be used as tools or equipment and weapons. Archaeologists have determined that the Stone of prehistoric humans (Universal) is between 2.5 million a year to about 4,000 years ago.
As the man began to know the rock to serve as tools or equipment and weapons. Archaeologists set to the stone age human prehistoric (global) between the 2.5 million years to approximately 4 000, years ago.