{"podcast":{"title":"The Rest Is Science","slug":"the-rest-is-science-7587315","podcast_index_feed_id":7587315,"rss_url":"https://feeds.megaphone.fm/GLT6907573392","website_url":"https://www.goalhanger.com","image_url":"https://megaphone.imgix.net/podcasts/0d68e376-bbe6-11f0-9c0a-3f76ef8f3285/image/f8f5780dd5dd75e83e158902c3830f1a.jpg?ixlib=rails-4.3.1&max-w=3000&max-h=3000&fit=crop&auto=format,compress","author":"Goalhanger","episode_count":71,"summary":"Join mathematician Professor Hannah Fry and science creator Michael Stevens (Vsauce) as they dig into the weird scientific questions that often go unexplored. Welcome to The Rest Is Science, a show that sits in the fascinating space between what we think we know, and what we actually know. Why do we assume we understand things like time, randomness, or even gravity? Once you start questioning these familiar ideas, reality becomes astonishingly strange and completely fragile. Whether you're a lifelong science fan or just naturally curious, The Rest Is Science will change your perception of reality, and prove that the biggest questions are always the most fun.","last_synced_at":"2026-07-16T10:22:06.711332+00:00","page_url":"https://stenobird.com/podcast/the-rest-is-science-7587315"},"episode":{"title":"The Most Dangerous Rock In Hannah's Collection","slug":"the-most-dangerous-rock-in-hannah-s-collection","published_at":"2026-07-01T23:10:00+00:00","page_url":"https://stenobird.com/podcast/the-rest-is-science-7587315/the-most-dangerous-rock-in-hannah-s-collection","show_page_url":"https://stenobird.com/podcast/the-rest-is-science-7587315","url":"https://pdst.fm/e/traffic.megaphone.fm/GLT9057021187.mp3","audio_url":"https://pdst.fm/e/traffic.megaphone.fm/GLT9057021187.mp3","summary":"When you think of dangerous geological specimens, does your mind jump straight to radioactive uranium, toxic heavy metals, or even asbestos? What if one of the most dangerous items sitting on a shelf is actually a polished, perfectly ordinary-looking piece of black obsidian? Professor Hannah Fry and Michael Stevens dive into the surprisingly treacherous geology and chemistry of obsidian. Hannah brings an onyx from her personal rock collection to explain exactly why this specific piece of material holds the title of the most dangerous rock she owns, unpicking the fascinating physical properties of the stone and exploring how its conchoidal fracture pattern can easily create edges sharper than a modern surgical scalpel. ------------------- For more information about Cancer Research UK, their research, breakthroughs and how you can support them, visit ⁠⁠https://cancerresearchuk.org/restisscience⁠⁠ Cancer Research UK is a registered charity in England and Wales (1089464), Scotland (SC041666), the Isle of Man (1103) and Jersey (247). A company limited by guarantee. Registered company in England and Wales (4325234) and the Isle of Man (5713F). Registered address: 2 Redman Place, London, E20 1JQ. ------------------- Find The Rest Is Science all over the internet by ⁠⁠clicking here.⁠⁠ ------------------- Video Producer: Adam Thornton + Oli Oakley + Jack MeekAnimator: Sam BensonVideo & Social: Bex TyrrellAssistant Producer: Lucy LipscombeProducer: Simona RataSenior Producer: Lauren Armstrong-CarterHead Of Digital: Samuel OakleyExec Producer: Neil Fearn Learn more about your ad choices. Visit podcastchoices.com/adchoices","meta_description":"When you think of dangerous geological specimens, does your mind jump straight to radioactive uranium, toxic heavy metals, or even asbestos? What if one o…","key_points":[],"chapters":[],"topics":[],"duration_seconds":3386,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/the-rest-is-science-7587315/episodes/the-most-dangerous-rock-in-hannah-s-collection/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/the-rest-is-science-7587315/the-most-dangerous-rock-in-hannah-s-collection.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}