Silurian Hypothesis: How to Find Very Ancient Civilizations? Science ASMR and Sleep Story

This video is entirely human made, 100% "no AI" (be it script or narration), and there are no ads during it.

The silurian hypothesis is not a theory, but rather a thought experiment: what if a civilization had existed on Earth millions of years ago? After such a long time, could it have left any trace, taking into account the natural decay of all materials, sedimentation and plate tectonics? This video is not about an actual ancient civilization of which we have zero evidence. It is about how long the remains of a technically advanced civilization such as ours could last, and testify of our existence.
This means looking into things such as the durabily of the materials we use and the things we build, the time it takes for our waste to disappear, geology, erosion... And also what kind of physical evidence of their existence different civilizations may leave behind them.

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Credits: Script and narration by the French Whisperer, visuals by the French Whisperer, under Wikipedia Commons, or under license from Panthermedia, Canstock, Shutterstock and Freepik. Sound effects and music from the YouTube Audio Library for Creators.

Links to Lights Out Library: my stories retold in American English by Olimpia.
- YouTube: https://www.youtube.com/channel/UCNa6KSDhYttemECVadSzcAg
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Links para la Biblioteca de los Sueños: mis historias contadas por Olimpia en español con acento mexicano:
- YouTube: https://www.youtube.com/channel/UCqwT6QOKdD9Ui2Lc6NfttWg
- Spotify: https://open.spotify.com/show/1t522alsv5RxFsAf9AmYfg
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- Amazon Music: https://music.amazon.com/podcasts/51d159da-b33a-4add-b4b8-1dfb37f5b139/la-biblioteca-de-los-sue%C3%B1os-documentarios-para-dormir

Links to la Bibliothèque des Rêves: mes histoires en français:
- YouTube: https://www.youtube.com/@UC6KOVLDBd6SXtLBOGWC223w
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- Apple Podcasts: https://podcasts.apple.com/us/podcast/la-biblioth%C3%A8que-des-r%C3%AAves-documentaires-pour-sendormir/id1810999555
- Deezer: https://deezer.com/show/1001849841

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Free trial link to the Slumber App: https://slumber.fm/fw
Slumber is a sleep and relaxation app that offers stories to fall asleep to from a variety of narrators, with sounds effects you can customize in the background, as well as meditations and ambient soundtracks. This link gives you 30 days of free trial instead of the usual 7 days. If you have trouble using the link, you need to install the app first, close it, then click on the link. I have an affiliate agreement with Slumber and this is a paid promotion in case you become a paying user after the trial.

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Timestamps:
0:00 Silurian Hypothesis
7:27 Textiles and Plastics
14:58 Metals and Buildings
23:45 Nuclear Waste
32:29 Fossilization
42:38 Sedimentation
53:39 Subduction, Erosion and Renewal of Earth's Surface
1:02:16 Indirect Evidence
1:07:36 Fermi Paradox and Astrobiology