Time is a construct that we as humans spend a lot of effort in defining, using, cursing & vilifying, and expending. As we define it, time is a human "invention". In physics, time is a fundamental quantity - a variable to be plugged into an equation or to affect another physical measurement. In quantum physics, time as we know and measure it has been shown not to exist. (see "double slit experiment", if you care to study this - then there is the interpolation of that experiment on light over deep-space distances - but I digress) This post is going to be confined to our traditional understanding and definition of time. I read something years ago about time that was one of those things that stuck with me and affected my thinking ever since. It went something like this: Time is the ONLY thing that is totally equal for everyone. Rich or poor, tall or short, happy or sad; we all have the same amount of time - 24 hours a day, 60 minutes an hour, 60 seconds a minute.
The universe, by definition, is infinite. It is arrogant for us to think mankind can formulate all the questions much less grasp all the answers.