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Damn, that cat has a long half life
18 half lives
If Earth has been around 4B years, do that mean there was a relative shitload of uranium when it formed? And that’s why lead is so common?
You’d still have over 10% of the sample remaining as U-235.
Also, lead was there in some minuscule quantity when the box was sealed, the only thing that’s changing is the proportion between the two.
