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That's true in the mathematical model of an infinite universe. The question is how relevant that is. We may never be certain that the...

Assuming the drive for extrasolar colonization has been preceded by development of autonomous robotic vessels for mining, refining and...

It seems to me a no-brainer in terms of resources that any ship would carry the blueprint for life and not generations of live human...

One key phrase is "technology that we already know" - which is not the same as "technology that has already been developed". There's...

The last section sums it up, in my opinion: Unless all these steps are taken, humans cannot successfully travel to and inhabit other...

Re the generation ship, SF author Kim Stanley Robinson wrote a good piece in Scientific American a few years back In addition to the...

but is it ethical / permissible to volunteer generations of your unborn descendants?

Just to add to examples in the post #12, there are "points at infinity" in projective geometry, e.g.,

That has no relevance to mathematics. The meaning of infinity depends on how it is formally defined.

I would add "at any given point". Our technological civilization grew in just about 3k years (give or take, add a zero, divide by ten...

Thank you very much for the suggestion. I will go through these. It's been very touching seeing the effect he had on this community by...

That's a description, not a definition. There is no single concept of infinity in mathematics. We might first encounter infinity in...

What's the longest you have ever lived like that? Even if we do build a "fusion drive", there is the problem of the rocket equation...

(1) Generation ships need not be "horribly inhumane". A space habitat hundreds of meters in diameter could be quite a pleasant place to...

Possibly, although I think natural evolution would be drastically reduced. Our medical technology would correct or compensate for most...