# 🔬 Your Blood Is 700 Million Years Old — And Scientists Just Found Out Why Pigeons Never Get Lost

Page: https://stenobird.com/podcast/science-news-daily-peer-review-d-7298183/your-blood-is-700-million-years-old-and-scientists-just-found-out-why-pigeons-never-get-lost
Text version: https://stenobird.com/podcast/science-news-daily-peer-review-d-7298183/your-blood-is-700-million-years-old-and-scientists-just-found-out-why-pigeons-never-get-lost.md
Podcast: [🎙️ Science News Daily | Peer Review'd](https://stenobird.com/podcast/science-news-daily-peer-review-d-7298183)
Published: 2026-05-31T12:05:08+00:00
Episode link: https://science-news-daily.transistor.fm/episodes/your-blood-is-700-million-years-old-and-scientists-just-found-out-why-pigeons-never-get-lost
Audio file: https://media.transistor.fm/98468206/128e537a.mp3
Processing state: not_requested
JSON: https://stenobird.com/v1/public/podcasts/science-news-daily-peer-review-d-7298183/episodes/your-blood-is-700-million-years-old-and-scientists-just-found-out-why-pigeons-never-get-lost
Duration seconds: 532

## Resource

Researchers have uncovered that the genetic blueprints for human blood and immune cells may date back over 700 million years, predating virtually all complex animal life as we know it. In a stunning twist, scientists also discovered that iron-filled immune cells in pigeon livers appear to function as built-in magnetic compasses, linking the immune system to environmental navigation in ways never previously imagined. So-called 'zombie cells' long villainized in aging research may actually play protective roles in the body, while a study of the world's oldest verified person is yielding new clues about extreme human longevity. Intermittent fasting is also reshaping our understanding of dieting — new brain scans reveal it may simultaneously rewire both gut bacteria and appetite-controlling regions of the brain. Plus, astronomers have been forced to create an entirely new category of dead star, and new models suggest Earth may have been sending microbial material toward Venus for billions of years. Subscribe to Peer Review'd Newsletter: https://peerreviewd.com/ Love Science? Check out our other Science tools: 60sec.site and Artificial Intelligence Radio

## Actions

- request_transcript: `POST https://stenobird.com/v1/public/podcasts/science-news-daily-peer-review-d-7298183/episodes/your-blood-is-700-million-years-old-and-scientists-just-found-out-why-pigeons-never-get-lost/transcription-requests` — Idempotently request low-priority transcript generation for this episode.
- read_markdown: `GET https://stenobird.com/podcast/science-news-daily-peer-review-d-7298183/your-blood-is-700-million-years-old-and-scientists-just-found-out-why-pigeons-never-get-lost.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.