It's one of our most important tools, and holds prominent place in many ancient philosophies and religions.We now know that the world's a lot more complicated, with over a hundred elements of matter which can be combined in a tremendous variety of ways.This might leave you wondering where fire fits in. What exactly is fire?Watching a flame dance through the air, you might conclude that fire's a gas, like oxygen or carbon dioxide.But the fire itself isn't any of these things.In fact, fire isn't anything at all.It's not its own type of matter; it's something that matter can do.
