# Une nouvelle bizarrerie découverte dans les poils de l’ornithorynque

Page: https://stenobird.com/podcast/les-matins-de-france-culture-1387120/une-nouvelle-bizarrerie-d-couverte-dans-les-poils-de-l-ornithorynque
Text version: https://stenobird.com/podcast/les-matins-de-france-culture-1387120/une-nouvelle-bizarrerie-d-couverte-dans-les-poils-de-l-ornithorynque.md
Podcast: [Les Matins de France Culture](https://stenobird.com/podcast/les-matins-de-france-culture-1387120)
Published: 2026-05-08T04:57:00+00:00
Episode link: https://www.radiofrance.fr/franceculture/podcasts/avec-sciences/une-nouvelle-bizarrerie-decouverte-dans-les-poils-de-l-ornithorynque-2464763
Audio file: https://proxycast.radiofrance.fr/f49f9cbe-cda3-4128-83a8-865d051de3da/10075-08.05.2026-ITEMA_24504650-2026C26620S0128-NET_MFC_9D95B01F-5D6F-4419-91FE-7874D1624553-21-ea7329a21276b4b976973cd681a43d65.mp3
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Duration seconds: 310

## Resource

Researchers have discovered a unique cellular structure within the platypus that defies known biological patterns. Unlike the solid or rod-shaped melanosomes found in other mammals and birds, the platypus possesses hollow, spherical melanosomes.

## Highlights
- Main idea: The platypus possesses a unique form of melanosome—hollow spheres—never before seen in other mammals or birds
- Scientific discovery: While most mammals have solid or rod-shaped pigment structures, the platypus features a distinct hollow architecture
- Research method: Scientists are building a global database of melanosomes using electron microscopy to map the relationship between structure and color
- Evolutionary mystery: It remains unclear if this hollow structure is an evolutionary adaptation to the platypus's specific aquatic habitat
- Future direction: Researchers aim to determine if animals sharing similar ecological niches exhibit similar pigment structural adaptations

## Topics

Platypus, Melanosomes, Evolutionary Biology, Mammalogy, Cellular Biology, Electron Microscopy, Zoology, Nanostructures

## Chapters
- 0:00 — The Platypus Anomaly: An introduction to the biological oddities of the platypus, from its egg-laying nature to its venomous spurs.
- 0:50 — The Role of Melanosomes: An explanation of melanosomes as specialized organelles responsible for producing and storing melanin in hair.
- 2:00 — Comparing Mammals and Birds: A look at the standard range of melanosome shapes, from spheres to rods, found in typical vertebrates.
- 2:40 — The Electron Microscopy Database: How scientists use electron micrographs to build a comparative database of pigment structures across species.
- 3:00 — A Unique Biological Finding: The revelation that the platypus contains hollow, spherical melanosomes, a structure absent in all other studied mammals.
- 4:10 — Evolutionary Implications: Speculation on whether this unique structure provides protection or is an adaptation to river and lagoon habitats.

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## Transcript

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