# When did volcanoes start existing? Page: https://stenobird.com/podcast/but-why-a-podcast-for-curious-kids-1011548/when-did-volcanoes-start-existing Text version: https://stenobird.com/podcast/but-why-a-podcast-for-curious-kids-1011548/when-did-volcanoes-start-existing.md Podcast: [But Why: A Podcast for Curious Kids](https://stenobird.com/podcast/but-why-a-podcast-for-curious-kids-1011548) Published: 2025-09-19T14:07:15+00:00 Episode link: https://play.prx.org/listen?ge=prx_326_19fac57f-eb7d-441c-9624-f52d44a4c5ab&uf=https%3A%2F%2Fpodcasts.vpr.net%2Fbut-why Audio file: https://www.podtrac.com/pts/redirect.mp3/tracking.swap.fm/track/sblTq32fyWAjsHzze2LG/dovetail.prxu.org/_/326/19fac57f-eb7d-441c-9624-f52d44a4c5ab/ButWhy_Volcanoes_Ep272.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/but-why-a-podcast-for-curious-kids-1011548/episodes/when-did-volcanoes-start-existing Duration seconds: 1561 ## Resource Volcanoes have been erupting on Earth for BILLIONS of years, and they’re still creating new landscapes today! Volcanoes can seem mysterious and scary, but people all over the world have learned to live in close proximity to active volcanoes. Today we answer questions you’ve sent us about how they form, how they erupt, what magma/lava is, and how volcanologists work to predict when they might erupt. Our guest is Freysteinn Sigmundsson, a volcanologist and professor at the University of Iceland. Download our learning guides and transcript: PDF | Google Slide | Transcript ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/but-why-a-podcast-for-curious-kids-1011548/episodes/when-did-volcanoes-start-existing/transcription-requests` — Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/but-why-a-podcast-for-curious-kids-1011548/when-did-volcanoes-start-existing.md` — Read the agent-friendly Markdown representation of this episode resource. A page view does not enqueue transcription. Agents should invoke `request_transcript` explicitly when they need this episode processed. ## Transcript Full transcripts are not published on public pages unless there is a clear rights basis.