Brainbites_wi on Instagram: "You start with gold that isn't much more than a glittery powder, so fine it's almost like smoke. But when you apply serious heat, over 1,900 degrees Fahrenheit. At that extreme temperature, the metallic bonds between the individual gold atoms break down, and the dust undergoes a phase change from a solid to a liquid. This molten pool allows any lighter, non-metallic impurities, what we call *slag*, to rise to the surface where they can be skimmed off. Then, you pour

Flag of USA : Historical Evolution - from 1775 to ... Future