Quite possibly the most common technique of manufacturing fire among prehistoric peoples was the friction system. Most commonly, a pointed hardwood was twirled involving the palms and pressed into a hole on the sting of the softer wood. Flint, pyrites, and fire drills are already found in Neolithic websites in https://edwinjbrgu.azzablog.com/36507108/not-known-facts-about-choosing-the-right-fire-safety-expert-for-your-business