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Then, as now, fire can hold body and soul together. It can greatly aid a human being in holding on to life and holding off death. Fire can not only cook food, but also, with its heat, reduce the amount of calories a human needs to stay alive. More heat from a fire means less calories required to stay warm. Fire dries out the wet skin, wet fur, wet polypropylene. It can scare away other meat-eating species intent on caloric intake of their own. It can be used to sharpen sticks for weapons, mold metal to make tools, and bake clay into pots. In an emergency today, a fire can be a signal for help. Who can place a value on the psychological comfort provided by fire? Perhaps its smoky warmth increased the life expectancy of early humans in more ways than are easily counted. And a fire can do all these things at once! Fire changed life on earth more than the wheel and The Web. The making of fire was arguably the greatest achievement of humans.