> Universe isn't infinite because we know it started with the big bang. We don't know that whatever was created then was not infinitely large. Also, we don't k

> Universe isn't infinite because we know it started with the big bang. We don't know that whatever was created then was not infinitely large. Also, we don't know how large it is now, due to inflation phase of the big bang creating a space so large that we're still receiving light/signals today that were outside our visible space yesterday.