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[-] prex@aussie.zone 14 points 6 days ago

I checked & found this in the footnotes:

Although elements 93 and 94, neptunium and plutonium, were created in 1940, their existence was not made public until after the war. They were given provisional names, when they were first made, of “extremium” and “ultimium,” because it was thought impossible that any heavier elements would ever be made.

this post was submitted on 27 Mar 2025
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