Gregory's Server@davidaugust plutonium-244 has a long enough half-life that we expect traces to be still present in the solar system! Not "useable" amounts in any way, though!
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 @davidaugust plutonium-244 has a long enough half-life that we expect traces to be still present in the solar system! Not "useable" amounts in any way, though! 1 comment
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@vicgrinberg really? Cool. What natural process makes it, but also keeps it undetected off earth?