{"podcast":{"title":"Oxford Sparks Big Questions","slug":"oxford-sparks-big-questions-420721","podcast_index_feed_id":420721,"rss_url":"https://oxfordsparks.libsyn.com/rss","website_url":"https://www.oxfordsparks.ox.ac.uk/","image_url":"https://static.libsyn.com/p/assets/2/2/c/f/22cf91023fb4a322/Big_Questions_Podcast_pink_HIGH_RES.jpg","author":"Fiona Jones","episode_count":100,"summary":"'Will my bacon sandwich kill me?', 'Is vaping better than smoking?', 'How do you become an astronaut?' - just some of the Big Questions we ask some of the brightest minds behind Oxford science. Join us in each podcast as we explore a different area of science.","last_synced_at":"2026-06-18T00:18:10.275517+00:00","page_url":"https://stenobird.com/podcast/oxford-sparks-big-questions-420721"},"episode":{"title":"What's the origin of water on Earth?","slug":"what-s-the-origin-of-water-on-earth","published_at":"2025-05-14T11:30:47+00:00","page_url":"https://stenobird.com/podcast/oxford-sparks-big-questions-420721/what-s-the-origin-of-water-on-earth","show_page_url":"https://stenobird.com/podcast/oxford-sparks-big-questions-420721","url":"https://oxfordsparks.libsyn.com/whats-the-origin-of-water-on-earth","audio_url":"https://traffic.libsyn.com/secure/oxfordsparks/OX_-_Origin_Water_v4.mp3?dest-id=790107","summary":"With more than 70% of its surface covered in water, Earth is rightly known as the \"blue planet\". But where did this water - so essential to life - originate? While some theories suggest that hydrogen was delivered to Earth from space via asteroids, new research indicates that the building blocks for water may have been present on our planet all along. We chat to Tom Barrett from Oxford's Department of Earth Sciences to find out more.","meta_description":"With more than 70% of its surface covered in water, Earth is rightly known as the \"blue planet\". But where did this water - so essential to life - origina…","key_points":[],"chapters":[],"topics":[],"duration_seconds":871,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/oxford-sparks-big-questions-420721/episodes/what-s-the-origin-of-water-on-earth/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/oxford-sparks-big-questions-420721/what-s-the-origin-of-water-on-earth.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}