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As to visit each other, not a chance IMHO. The distances involved are just far too huge.
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Yet, only a little over 100 years ago, we couldn't fly. 60 years ago, we couldn't even get into orbit, let alone leave the planet. Look how far we've come in such a short time. What will we do in another 50-200 years, let alone 500-1000 years. Nothing within reason is impossible.