The most expensive substance in the world

 Here's some videos on a novel clock of another type:

https://youtu.be/n_8MmQShWnU?si=KGL2uEScYHkGBwet

https://youtu.be/1-_NHKCzbEA?si=6IY1PVUg5LUd5KTz

11/11/2024 7:03 PM

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