Quintillion ...haven’t read or heard that number since I was a kid in the 60’s ...Learned in an encyclopedia that the earth at that time weighed 6 sextillion , 575 quintillion tons ...Never forgot it . How someone determined that weight is beyond me .
And how exactly do they know it stays the same weight?
We use up resources so you would think it would get lighter, but then again the population increases so that would add weight.
It's enough to make your head explode.