Making, using tools and using fire are two important events in the history of ancient human evolution. According to the evidence that has been found, the history of human consciously manufacturing and using stone tools can be traced back to about 2.5 million years ago. This time is far later than the time when the earliest humans and apes evolved and appeared respectively (7-5 million years ago). There are still controversies in academia about when ancient humans began to use fire.
Some scholars believe that human beings began to use fire more than 400000 years ago; Other scholars believe that human beings consciously controlled the use of fire in the Middle Pleistocene about 200000 years ago. Despite these controversies, paleoanthropologists generally believe that the manufacture and use of tools and fire played an important role in promoting human evolution. The use of tools enabled ancient humans to improve their hunting ability, obtain more animal food and improve their hunting ability. Ancient humans used fire to drive away cold and beasts. At the same time, fire can process meat food and obtain more nutrients such as protein, which promotes the evolution of the brain and the improvement of intelligence level.