HopDavid said:
Logistic is much like exponential growth until the population nears the maximum size local resources can sustain. Then growth slows down.
Who was it who said that a population expands to the limits of its food supply? I thought that was Malthus.
and also said:
If real estate is measured in area, the asteroids have many thousands of times as much real estate available at the rocky planets or big moons.
True, but gravity - or rather the lack of it - would be a problem. It's odd but true that the time taken for a close orbit around any sphere of Earth-like density is about 90 minutes. This means that if you go for a stroll on the surface of a one mile diameter rock, you're likely to walk right off into space.
As with the Moon, you would want to tunnel into an asteroid. You might then think about setting the whole thing spinning so as to create virtual gravity on the inside but beware because rock does not have great tensile strength.
The deciding factor though would surely be the presence or absence of water.
ladylola said:
Then there's the question of who would be sent to this new planet. Would we send our best and leave the uneducated masses on earth to continue breeding unchecked or send the "excess " populations away.
This is not a trivial question. The intuitive answer is to send 'the best' but, by doing that, you risk leaving out some part of the gene pool that 'the best' don't have. By the time you find out you'll be many generations down the line - and just as many light years from home - and it'll be too late to go back for a token idiot.
Susiejb said:
Whenever I have had this discussion before I have always argued that life on another planet would in no way evolve as we have, I imagine they would indeed look like aliens.....surely no other planet would follow the same evolutionary pattern as our own ie dinosaurs ....etc.
No, but chemistry works the same everywhere. If it's a planet with liquid water and an oxygen atmosphere, we can expect to find life not entirely different to what we have here.
The life forms might look different but the biochemistry will be familiar. In fact life as we know it is pretty much a prerequisite for an oxygen atmosphere (NOT the other way around). Although there's a lot of oxygen sloshing around the universe, it's all firmly bound up to other elements. It needs photosynthesis to break it free.
On the other hand, take a planet with a hot, dense atmosphere then add an ocean full of fluorides and the rules change completely.