Wealth on Instagram: "Faced with absolute darkness underground, miners engineered their own light using nothing but water, metal and chemistry ⚡️🔥 Long before electricity existed, mining tunnels were some of the darkest and most dangerous workplaces on Earth. To survive, miners relied on carbide lamps, a brilliant piece of early engineering that produced bright, steady flame in the middle of complete darkness. The lamp worked by dripping water onto calcium carbide, creating acetylene gas. When