*Sample* | 1-Hour History of Coal: Geology, Discovery, Industrial Revolution, & Coal Miner Experiences | Relax & Sleep with History (Bonus Episode #63)

The full version of this episode (74 minutes & Ad-free) is available for Silk+ Members (FREE for a limited time!) and includes access to over 600 more episodes from these podcasts: Calm History (90+ 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) … Continue reading *Sample* | 1-Hour History of Coal: Geology, Discovery, Industrial Revolution, & Coal Miner Experiences | Relax & Sleep with History (Bonus Episode #63)