/sci/ - Science & Math

I was thinking of something, doesn't infinity seem like an impossible concept. I know a lot of mathematical theory is based on the concept of infinity, but does it really exist?
I'm more into physics, and the way we use infinity in our equations is just a way of saying (big number), not in a literal sense, but in math they use it for real. If the universe is actually finite, does this hold any ground?

Is there anything in the physical world that is infinite?