It might be easy to think of fire only as a source of heat or something to cook food, but it had so many more uses. Fire helped early humans clear landscapes, clean their dwellings of insects, and even make tools. It has been harnessed for more than a million years, but only more recently did hominids learn to produce it on their own. And now, using the most basic fire-starting tools, two amateurs will attempt to start their own fires.