This is the story of a momentous event in human history: the discovery of fire. It is a tale of how our ancestors first learned to control and use fire, and how it changed the course of human evolution. From the first spark of a flame to the development of fire-
From Wikipedia
The control of fire by early humans was a critical technology enabling the evolution of humans. Fire provided a source of warmth and lighting, protection from predators, a way to create more advanced hunting tools, and a method for cooking food. These advances allowed human geographic dispersal, cultural innovations, and changes to diet and behavior.