How to pronounce “natural number” in English

So it would appear there are fewer squares than natural numbers, but Galileo realized he could draw a line matching every natural number with its own square.

So he imagined writing down an infinite list with a natural number on one side and a real number between zero and one on the other.

- I'm gonna prove to you- - Okay - ...that every natural number is interesting.

So therefore, for every natural number N, we have a real number, let's call it R sub N.

This is a countably infinite collection because we could list each rotation and assign it a natural number, but the surface of a ball has uncountably infinite points

So let me ask this room that question, how many of you are natural number crunchers?