They constitute the very essence of the modern world; the cadence of our progress sounds in the measured ring of the blacksmith's hammer. From soaring skyscrapers and sturdy bridges to jet planes and rockets, metals play a key role. See more in Season 9, Episode 31, "Metal." Love Modern Marvels? Stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. #ModernMarvels Subscribe for more from Modern Marvels and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show on our site: https://www.history.com/shows/modern-marvels Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Instagram - https://www.instagram.com/history TikTok - https://www.tiktok.com/@history "Modern Marvels" goes beyond the basics to provide insight and history into things we wonder about and that impact our lives. The HISTORY® Channel, a division of A+E Networks, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok. For additional press materials visit the A+E Networks Press Center at http://press.aenetworks.com.