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Comment by fnordpiglet | Hacker News Reader
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fnordpiglet
·
How is there any tablespoons in the earths crust?
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deepspace
·
It is continuously formed by the decay of Thorium and Uranium.
bell-cot
·
Here's a radioactive decay chain showing that:
https://upload.wikimedia.org/wikipedia/commons/thumb/6/65/De...
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