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This video is sponsored by Audible simply because my book is in audiobook form on it, read by myself (it does it to me again). You have the INCREDIBLE LUCK to have 2 free months with 2 free audiobooks on this link: https://www.audible.fr/cyrusnorth Sources: - https://skepdic.com/crystals.html - https://pubmed.ncbi.nlm.nih.gov/12233... - https://fr.wikipedia.org/wiki/Piézoél... - https://www.frontiersin.org/articles/... - https://www.taylorfrancis.com/chapter... - / 3 - https://sante.lefigaro.fr/article/la-... Editing: Alexandre Giron Miniature: Mehdi Djouhri