{"podcast":{"title":"Bedrock: Earth's Earliest History","slug":"bedrock-earth-s-earliest-history-4890111","podcast_index_feed_id":4890111,"rss_url":"https://feeds.captivate.fm/bedrock/","website_url":"https://www.bedrockpodcast.com","image_url":"https://artwork.captivate.fm/34ee9905-8cf0-4e69-bebf-e80566ab6988/ukXddByeTkHOe-lZVcWcWuBY.jpg","author":"Dylan Wilmeth","episode_count":77,"summary":"This podcast starts at the beginning of Earth's prehistory and works forward through time. Bedrock will explore the first 90% of Earth’s past, a time known as the Precambrian Era. Before humans, before dinosaurs… there was the Precambrian. The Earth was an incredibly alien world, but not a dead one. Along the way, you will build a mental toolkit to see the world like a geologist. You will never look at a mountain, the moon, or pond scum in quite the same way again. Welcome to Bedrock. For transcripts, visuals, and references, check out https://www.bedrockpodcast.com","last_synced_at":"2026-07-16T00:21:49.622247+00:00","page_url":"https://stenobird.com/podcast/bedrock-earth-s-earliest-history-4890111"},"episode":{"title":"48: The Impossible Rock","slug":"48-the-impossible-rock","published_at":"2025-10-22T18:00:00+00:00","page_url":"https://stenobird.com/podcast/bedrock-earth-s-earliest-history-4890111/48-the-impossible-rock","show_page_url":"https://stenobird.com/podcast/bedrock-earth-s-earliest-history-4890111","url":"https://bedrock.captivate.fm/episode/48-the-impossible-rock","audio_url":"https://episodes.captivate.fm/episode/c0b83189-1c68-4cc8-a3f2-ea3edc921808.mp3","summary":"What is the hardest rock to make? Today's rock is very common in Earth's ancient past, and it should be everywhere today. However, it's nearly impossible to form in nature or the laboratory. Some experiments have tried for 32 years with no success! This rock is dolomite. Today, we address The Dolomite Problem, one of geology's longest-running mysteries. Along the way, we'll meet some smelly but helpful bacteria, sort a fruit stand, and learn about the cutting edge of geology research. Extra Credit: Eat some citrus, and check your home for natural gas leaks.","meta_description":"What is the hardest rock to make? Today's rock is very common in Earth's ancient past, and it should be everywhere today. However, it's nearly impossible…","key_points":[],"chapters":[],"topics":[],"duration_seconds":1871,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/bedrock-earth-s-earliest-history-4890111/episodes/48-the-impossible-rock/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/bedrock-earth-s-earliest-history-4890111/48-the-impossible-rock.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}