The Romans used it to represent 1000, a BIG number to them. The concept of infinity has tantalized and sometimes troubled mankind even longer.
Most religions attempt to explain in their own ways the mysteries and vagaries of the infinite.
So the two lists are exactly the same size, infinite. Cantor was able to demonstrate that there are different sizes of infinity. The infinity of decimal numbers that are bigger than zero but smaller than one is greater than the infinity of counting numbers. Think about it, then click for an explanation . The bottom line is that weird things can happen with infinity.