This, as he found out, isn’t something you should do lightly, as the one he used ended up containing an interesting mix of radioactive materials, including small amounts of plutonium-239 ...
IFLScience on MSN5mon
US Produces First Plutonium Pit For Nuclear Weapons Since 1989Most of these varieties are fissile - meaning their atomic nuclei can easily be split. Plutonium-239 is the isotope typically ...
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