Curator of globalization at the Smithsonian’s National Museum of Natural History, Joshua A. Bell, along with other experts, discusses the role of rocks in powering our cellphones. The podcast explores the use of indium in touch screens, the rarity and importance of tantalum, challenges of recycling old phones, and the process of e-waste recycling. It emphasizes responsible usage and highlights the exhibition 'Cell Phone, Unseen Connections'.