Around 100 years ago we only knew of one galaxy, our Milkyway and that was our whole universe. The sun and the planets of our solar system seemed still too far away. Today the estimate is there are between 200 billion to 2 trillion galaxies in the observable universe. Now if you let these numbers sink in to your head, suddenly our sun and the planets of our little solar system seem like neighbors. With time human beings have always discovered new outer limits of distance, squeezing the last known outer limit. Something like starting with a dot and keep moving in larger and larger circles. If we ever encounter a creature from another world in next 100 or 1000 or 10000 years, our planet earth will seem like one entity without borders. Until then we can assume there will be divides. To a man of that time, the meaning of foreign will be totally different than ours. As it was for a man 100 or 1000 or 10000 years before us. Let’s keep this in mind and move ahead.

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