# Episode 239 - Nocturnality Page: https://stenobird.com/podcast/the-common-descent-podcast-466591/episode-239-nocturnality Text version: https://stenobird.com/podcast/the-common-descent-podcast-466591/episode-239-nocturnality.md Podcast: [The Common Descent Podcast](https://stenobird.com/podcast/the-common-descent-podcast-466591) Published: 2026-03-15T00:18:48+00:00 Episode link: https://commondescentpodcast.podbean.com/e/episode-239-nocturnality/ Audio file: https://mcdn.podbean.com/mf/web/mrrp5mjxj97jhee9/Episode_239_Nocturnality.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/the-common-descent-podcast-466591/episodes/episode-239-nocturnality Duration seconds: 8053 ## Resource Creatures of the night! The world is a different place in the dark, and a whole array of organisms have adapted to being most active outside of daytime hours. This episode, we’ll explore the regular traits that allow nocturnal animals to get by, we’ll discuss some of the ways nocturnal evolution has shaped living species, and we’ll investigate which – if any – of these traits we can identify in the fossil record. In the news: snake hormones, Australian amphibians, ancient microbes, and baby dinosaurs. Time markers:Intro & Announcements: 00:00:00News: 00:07:25Main discussion, Part 1: 00:39:15Main discussion, Part 2: 01:14:30Patron question: 02:03:45 Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/ Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast Got a topic you want to hear about? Submit your episode request here: https://commondescentpodcast.com/request-a-topic/ Lots more ways to connect with us: https://linktr.ee/common_descent The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org Musical Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0 ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/the-common-descent-podcast-466591/episodes/episode-239-nocturnality/transcription-requests` — Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/the-common-descent-podcast-466591/episode-239-nocturnality.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.