Life on Earth has been around for, what, about 3 billion years? It has been projected that in about a billion more years, all of Earth's oceans will evaporate. I assume most life will succumb. So, we're already about 3/4 of the way through the period of life on Earth. tick tock
I don't think life on earth will ever get to another star. Distances are just too far. And yeah, intergalactic travel is near impossible
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if we wanted to just seed *some* life - even a bacterium - i'll bet we could do it by 2025 a live, fertile human being (well, preferably at least 300) is another question entirely
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Not to mention the problem of making a new planet habitable
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I think you have to just send the ships to systems with earth-sized star planets and assume they'll all die eventually if none of them are terrestrial
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Ideally, you would perfect fully artificial habitats in Sol system first (that only need asteroids/gas giants/whatever for feedstocks), then send those. No planet, no problem.
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I sincerely doubt the human race will even be around to see the sun inflate and destroy earth. A billion+ years is a long time to sit around and not explore space without killing ourselves via disgenics or war.
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or just speciating and being unrecognizable to TCY hominids
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tbf, I only mentioned life on Earth, not humans or descendants
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True but if we go then so does everything else unless some benevolent alien race comes across Earth and decides to do an Arc. I really doubt that if we die out, there will ever be a second species to rise up and become sapient to such a degree that it can leave earth.
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A major portion of the human race never even invented the wheel and axle until another part showed them how.
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