Suppose that the Universe is infinitely large and would then contain an infinite number of uniformly distributed stars. This would indicate, then, that the night sky should not, in fact, be dark, it should be infinitely bright! Even if the stars are at a great distance away, there would be more stars at that distance, and thus a large amount of light. So why then, does the night sky appear dark?
Now, one could easily use Google to find a solution to this apparent paradox, but try not to do that, you won't be exercising your mind if you do. Just take a few moments, think, and then post your proposed solution. If you would like, you can then Google it, but I shouldn't take as long to answer this one as I did the previous.