I agree that analytical techiniques (e.g. detection of radio isotopes) are amazing, but I think this scale is off. (100^3)x(1000kg)=10^12 grams vs 1mg is a par

I agree that analytical techiniques (e.g. detection of radio isotopes) are amazing, but I think this scale is off. (100^3)x(1000kg)=10^12 grams vs 1mg is a part per quadrillion. So a 10m cube compared to a 1mm cube is part per trillion. That's the 10,000^3 ratio.