If I were to ask you, "What time is it?", what would be your reply? If I asked you the current year, you'd no doubt be able to tell me.
...or would you?
In case you've never really thought much about it, nobody knows what time it really is. The system that tells us it's 2006... we made it up long ago. We've only created a way to keep track of time. A system in which to record the otherwise random events in everyday life. It's really no more complex than that. But more simply, we just don't know when time began.
When did it begin? How was Earth created? Where did animals come from? How did we get here? And when? What is our purpose? How long will we be here? Will our species have a chance to thrive? Are we alone in the universe? Is there a god? Or an afterlife? If so, what is it like? How long will we be there? ... So many questions, so much left unanswered.
People will believe anything. Somewhere out there is a made-up explanation for any question you might have. Yet still, regardless of whatever your belief system happens to be, there is only one pure truth when it comes to all of these questions. And that truth ... is that no one knows.
People will tell you all sorts of things; desperately persuading you to adopt certain beliefs. Yet, there are so many conflicting viewpoints in the world, how can we logically validate any of them? You may believe in a god; I may not. You may believe extra-terrestrials visit us often. I might see us as a gradual product of alien life. You see Earth as one of a kind. I see it as one of billions out there. The truth is that we are both neither right nor wrong. We are merely speculating. We're playing the universal game of Trivial Pursuit and arguing over our guesses... before the answer on the card is even read.
We don't know. And we likely never will. The best we can do is to think for ourselves and come to our own conclusions as to what makes the most sense... even if we don't all agree on certain details. And until we are serious about doing this, we will not prosper.
(Welcome to my thoughts. Make yourself comfortable.)