Can "Infinity" ever be more than a mathematical abstraction? Without any real world evidence, for me the answer would be "no". Yet, our Universe is thought to be flat and without a special topology that would seem to imply infinity. Many concede that the Universe likely is infinite. How can science so readily concede that infinity is a real possibility when there is no evidence of infinity outside of math? Here I'm speaking of infinity of space and time and not some situation where the infinity is just do to the framework imposed such as walking around the North Pole and calling space there a Singularity just because the time zones all converge or some such example.