re: #153 steve_davis

Keith Richards has a half-life longer than plutonium.

Which isotope of plutonium? They all have shortish half-lives which is why no native sources of plutonium are known to exist in any quantity in ore bodies (there may be a few atoms of native Pu-239 resulting from neutron capture of a U-238 nucleus). There’s Xe-124 whose half-life is about 18 sextillion years (1.8 x 10^22 years), that might better fit Keef’s life expectancy. After that there’s always proton decay, maybe.