jamie_russels Wrote:Also, I did some research on something else. Apparently the total amount of water on earth is "1.386x10^21 liters", whatever that means. I don't know what the X and the ^ is for, but I'll continue anyways. There are almost 7 billion people on earth, so let's assume that human beings drink two liters of water a day, which could be true for some people. Some people drink a lot of water. That would mean that every human being on this planet collectively drinks 12x10^9 liters of water a day (I'm pretty sure that's right, I had to ask some Asian guy I know to do the math for me. I kinda suck at math)
1.4x10^21 (for simplicity's sake) divided by 12x10^9 gives us 1.16x10^29 days i.e. how long it takes us to drink that water. Divide by 365 and we get 3.20x10^26 years. Divide by 10^9 to get 3.2x10^17 billion years. The time you specified was 3 billion years for us to drink it in... well let's do some more maths to see just how off your friend was. 3 divided by 9.5 gives us 0.31 billion years to drink that water. Divide 3.2x10^17 by 0.31 to get 1.03x10^18.
What does that final number mean? It means your friend overshot the calculation by a factor of 1030000000000000000, or if you prefer percentages, the margin of error was 103000000000000000000%
None of this even matters because of one simple fact: water gets recycled after we excrete it.
"It is the mark of an educated mind to be able to entertain a thought without accepting it" ~ Aristotle
