The Last Question was written by Isaac Asimov (I, Robot, Bicentennial Man) and is about some of the existential questions we ask ourselves. It's a quick read (20 minutes) and is thoroughly enjoyable.
That's strange that the link changes. Here is another link: https://scholarscup.wikispaces.com/file/view/The+Last+Question+--+Isaac+Asimov.pdf/187936405/The%20Last%20Question%20--%20Isaac%20Asimov.pdf