“No one can deny the excitement of visiting another world.”
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It would be a pity if, frustrated by the price of travel, we elected to become a society that never made contact, that never gave SETI a fair chance.
Barney Oliver 
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In the past, on Earth, it has largely been to exploit foreign resources and to expand the domestic territory.
Barney Oliver
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If interstellar travel is as time- or energy- demanding as the above figures indicate, it is far from obvious what the motive for colonization might be.
Barney Oliver
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Antimatter is not a source of energy for us, it's a method of storing energy, compact but inefficient.
Barney Oliver
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Above all, I would not expect a wise race, at great expense, to set loose an army of self-replicating robots.
Barney Oliver
50% of people like this quote