According to cave art and scientific evidence, pre-historic neanderthals discovered fire by rubbing two flint stones together and generating heat. He had no idea about cultivation and house building. Stones have been commonly used for various purposes and serving a variety of needs. They were used to hunt prey by shaping them into sharp points attached to a stick or javelin. Thus, it formed a spear. Stones have been used to construct houses and borders. These helped in demarcating land.