So, we've been putting off a kind of basic question here. What is money? What is currency? How are the two different. Well, not to give away too much, but money has a few basic functions. It acts as a store of value, a medium of exchange, and as a unit of account. Money isn't just bills and coins. It can be anything that meets these three criteria. In US prisons, apparently, pouches of Mackerel are currency. Yes, mackerel the fish. Paper and coins work as money because they're backed by the government, which is an advantage over mackerel. So, once you've got money, you need finance. We'll talk about borrowing, lending, interest, and stocks and bonds. Also, this episode features a giant zucchini, which Adriene grew in her garden. So that's cool.