For thousands of years, people used gold as money. But why gold? Why not some other element? We tracked down an expert to find out.
Everyone knows that gold is the backbone of global currency. But how did gold get chosen from among all the elements of the periodic table? NPR's Planet Money team explains.
For more on gold, money and the periodic table, see our story "Why Gold? A Chemist Explains."
This is the second in our series of video collaborations with Slate. Watch the first video, What Is GDP?