💡 Tip: If one source doesn't work, try another. Each source may have different availability.
Loading player...
Note: If the current source doesn't work, try switching to another source above. The player automatically adjusts security settings to ensure compatibility. Some sources may show popups - this is normal for free streaming services.
💡 Tip: If videos won't load, try disabling your ad blocker and refresh the page.
Bacteria, viruses, but also fungi, algae, pollen, and even insects: micro-organisms thrive and circulate constantly in our sky. How can so many living beings find their way into the air and circulate? How do they survive? And what influence do they have on our lives and the living world? Biodiversity, health, climate: it is only recently that scientists have begun to understand how this discreet aerial "plankton" affects our lives and our ecosystem. But despite their many virtues, some of these micro-organisms are now threatened by human activities. With the help of experts and 3D models, this scientific investigation plunges us into the heart of a still mysterious world, and reveals the diversity and fragility of the air we breathe.