Crossposts: https://chuka-lis.livejournal.com/300855.html

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How radioactive are common fossils? Testing rocks with Geiger counter GMC-320

"" (Watch on YouTube)

https://www.youtube.com/watch?v=NoO4h86edo0&list=PLS1fY-Qti7sduzZ8u1p3S1whHQ2XXxFR4&index=6&t=0s

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