# The Fish That Could Walk | Sean B. Carrol Page: https://stenobird.com/podcast/nova-presents-1297629/the-fish-that-could-walk-sean-b-carrol Text version: https://stenobird.com/podcast/nova-presents-1297629/the-fish-that-could-walk-sean-b-carrol.md Podcast: [NOVA Presents](https://stenobird.com/podcast/nova-presents-1297629) Published: 2026-04-15T10:00:00+00:00 Episode link: https://play.prx.org/listen?ge=prx_322_62219cd0-4812-48a7-9a4b-f8e8475781f0&uf=https%3A%2F%2Ffeeds.wgbh.org%2F322%2Ffeed-rss.xml Audio file: https://dts.podtrac.com/redirect.mp3/tracking.swap.fm/track/sblTq32fyWAjsHzze2LG/dovetail.prxu.org/_/322/62219cd0-4812-48a7-9a4b-f8e8475781f0/The_Fish_That_Could_Walk_Sean_Carroll_01.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/nova-presents-1297629/episodes/the-fish-that-could-walk-sean-b-carrol Duration seconds: 94 ## Resource How did animals first make the giant step from water to land? Evolutionary biologist Sean B. Carroll explains how the discovery of Tiktaalik—a fossil with both fish and limb-like features—revealed a key moment in evolution. For more, check out the extended interview with Sean B. Carroll. Learn more about NOVA and subscribe to our YouTube channel. ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/nova-presents-1297629/episodes/the-fish-that-could-walk-sean-b-carrol/transcription-requests` — Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/nova-presents-1297629/the-fish-that-could-walk-sean-b-carrol.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.