@prehistoricastronauts Patreon Spotify Apple Podcasts Let’s return to those protruding knobs found on megalithic monuments all over the world. I don’t know if you have ever cast anything yourself—plaster, concrete, it doesn’t really matter. Whatever material you pour, you end up with these same kinds of protrusions when the mold is removed. To melt granite, temperatures of roughly 1,200 to 1,300 degrees Celsius are required—about the same heat needed to melt metal. Melting stone is therefore not