Two people of the same gender and heterosexualorientation who decide to be each others life partners, but asexually; living together but unromantically.
Diane and Mary decided that if they were unattatched by the age of 35, they would move to NY together and be hetero life mates.
caged plutonium which is a transuranic material that has a half-life of 24,065 years, making it decay (into different elements) inside a zinc-aluminum hull (the aluminum delicates due to the radiation and thus might crumble depending on the weight of plutonium-239) but doesn't rust as easily due to the zinc coating
"Our team have created a simulation of the half-life decay of plutonium-239 in a zinc-aluminum material lined caging scenario."