If you want a different answer, ask a different question. If you ask the exact same questions that I already answered, you're not looking for a new answer, you're looking for clarification.
I don't know. Why don't you go back in time and stop humans from migrating, and then come back to 2009 and see if anything is different? Since you're so into science fiction, you ought to know about time paradoxes.
For the development of the brain.
Using logic isn't stating what you believe, it's stating the most reasonable conclusion. You don't need hard evidence to use logic.
You people really need to learn how to shut up. Yes, the Voyager did leave the solar system, but how long will it take for it to travel 20 light years? As for the rest of your comment, it's too long, drawn out, and stupid, and I don't have the time to waste on people who's main purpose in life is to piss me off with ridiculously ridiculous comments.
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