If you’ve ever slept outdoors or even just watched a survival reality show, you know the importance of fire. Fire is warmth, energy, safety. Fire bridges the line between comfort and discomfort. Even life and death.

Early humans’ ability to tame fire — which took hundreds of thousands of years to develop — changed the course of history. Human biology too. Taming fire led to cooked food which increased the calories in human diets, growing the size of our brains.

Fire was and is pivotal. But fire is also dangerous. It kills people. It’s difficult to tame. It’s not easy to…