I suspect that time is a human made conception. How far can we see? We can see forever. Forever itself is a concept. But it's one that we can't really grasp. We measure things. Beginning, endings. When does a cloud begin? When we see the very first whisps of it in the sky? When does it cease? When it disappears before our gaze? No, the cloud comes into being because of a temperature drop, and goes out with a temperature rise. But it was always there. Like the universe...I suspect.