One of the first things they teach in science is that stuff is made out of other stuff, or rather, the more you break things down, the more things you find to break down further. Take a rock, for example: Rocks are composed of one or more minerals. Some rocks have just one primary mineral, like limestone, which is made of calcite. But the rocks that make up the glowing core of our Earth? Well, those guys wouldn’t be who they are without the help of... More >>>