Energy sources are a big topic of conversation these days. With fossil fuels being both damaging to the environment and increasingly difficult to acquire, we’re looking into a wide variety of alternatives — some of which are cutting-edge, and others of which are very old indeed.
The one option that’s been with us from the start has been muscle power. Our own to begin with; later, after we domesticated animals, we got to use theirs instead. For millennia, everything from agriculture to textile manufacture to metalworking has been carried out with sweat and toil, fueled by the food we and our livestock eat. But of course, you can’t elbow grease your way to everything. No amount of direct labor will cause food to cook, nor pottery to harden, nor ores to smelt.
For that, we needed fire.
(more…)