# When Whales Could Walk Page: https://stenobird.com/podcast/nova-presents-1297629/when-whales-could-walk Text version: https://stenobird.com/podcast/nova-presents-1297629/when-whales-could-walk.md Podcast: [NOVA Presents](https://stenobird.com/podcast/nova-presents-1297629) Published: 2026-04-14T10:00:00+00:00 Episode link: https://play.prx.org/listen?ge=prx_322_77f324c7-3f56-4ae5-b894-e08f31000945&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/_/322/77f324c7-3f56-4ae5-b894-e08f31000945/NOVA_Remix_WWCWalk_Podcast_Audio_A_FINAL_01.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/nova-presents-1297629/episodes/when-whales-could-walk Duration seconds: 1108 ## Resource What if whales had legs? Once upon a time, they did. Sort of. An astonishing fossil trail shows that modern whales actually evolved from hooved land mammals. Whales still carry the fingerprints of this past, from their stomach anatomy to their swimming gait. Dive in to discover the wild story of how whales traded legs for fins, as we uncover clues about their ancestors, as well as their unlikely present-day relatives. To watch the full film, visit https://www.pbs.org/wgbh/nova/video/when-whales-could-walk/ Learn more about NOVA and subscribe to our YouTube channel. ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/nova-presents-1297629/episodes/when-whales-could-walk/transcription-requests` — Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/nova-presents-1297629/when-whales-could-walk.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.