42 - Precious Metals

Summary: <p>Almost all of human culture and economics is structured around a handful of pretty metals that we have arbitrarily assigned value to! </p> <p><span></span></p> <p><span>Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! </span></p> <p><span></span></p> <p><span>If you want to learn more about any of our main topics, check out this episode's page at scishowtangents.org!</span></p>