==I own gold. Actually part interest in several gold mines.
That’s good, it will definitely pay off in the coming years. Enough said about gold.
The uranium, however is an appropriate topic in this discussion. It decays and the rate of decay can be measured. Decay products appear in the vicinity of the uranium, are unique isotopes and can also be measured. It’s a kind of clock or windup watch if we want to use the analogy and produces an initial windup date the uranium would have been fresh.