You can use arrow keys to navigate in the map.
It depends on what you mean by infinity. In mathematics, you can treat infinity like a number so long as it is meaningful to do so. If you mean physical infinities, there are many results in physics that require adding terms that are infinite to get something finite.
Mathematics as we know it today could not exist without at least the concept of infinity.
Any object can be divided infinitely and yet the parts of it always exist in one form or another.
True Infinity is not adequately defined.
We can never achieve an infinite amount of accuracy
Time is infinite