#32 | History of Coal: Geology, Discovery, Industrial Revolution, Mining Dangers, Miner Strikes, & More | Learn, Relax, Sleep

Access over 70+ Ad-Free episodes of Calm History by becoming a Silk+ Member (FREE for a limited time!) and enjoy over 600 total episodes from these relaxing podcasts: * Calm History (70+ episodes) * Sleep Whispers (430+ episodes) * ASMR Sleep Station (50+ episodes) * 1 & 8-Hour Nature Sounds (50+ episodes) * 1 & 8-Hour Background Sounds (30 episodes) * Counselor Curt ASMR (20+ episodes) * ASMR University (10 episodes) ************************************* Become a Silk+ Member for FREE [silkpodcasts.com/plus] To get alerts of new episodes, tap “Follow“ on [Apple or Spotify] Shape the future of Calm History [Vote Now] Rate & review Calm History on [Apple Podcasts] Website, Contact, & All My Podcasts [silkpodcasts.com] Explore my Favorite Goodies [silkpodcasts.com/faves] Visit the Silk+ Expo [silkpodcasts.com/expo]   *Content adapted, remixed, edited, and produced by Harris from materials in the public domain and from Wikipedia. Calm History is part of the Airwave Media podcast network: AirwaveMedia.com Contact [email protected] if you would like to advertise on this podcast.