Humans have always wanted to know what was on the other side of the mountain. That and the need for new food sources and better living conditions pushed a man into exploring farther and farther away from their homes. That exploration created the need for innovative ways of living and better tools to help them in their daily life. Changes in the physical features of an area over a period of time can change how the people live there. If the weather became warmer or colder the humans had to adapt, maybe by building shelters or finding a cave to live in. Those changes also caused migration. The hunter-gather societies were mostly nomads they moved around, living off the land. They had no permeant homes. All the people worked equally to
