Just a thought, as I am on the bus; We should not only be obsessed with sending humans to the nearest planets, we should be sending microbial life to all sectors of our galaxy. If it is unrealistic for us to ever travel beyond our solar system, and if the possibility exists that we are the first or only lifeforms in our galaxy, then we have a duty to ensure the survival of life,even if that life is not our species. At some point we should send out spacecrafts that will travel indefinitely in every direction, until we sadly become extinct. Many of those crafts will by the law of averages crash into habitable planets, and if we continue to this for the next 1 million years until our eventual demise, one of those microbes will take hold and multiply, ensuring the continuation of life.
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