Big asteroids are a valid concern, and very long-term I do believe humans should work at establishing a human presence on other worlds (starting with the Moon), however asteroid bombardment should *not* be a factor in driving humans to inhabit other worlds.
It would be far, far easier for us to improve our capabilities for detecting large asteroids, and then deflecting them, than to figure out how to live on Mars. Dealing with asteroids is not that hard: first we have to actually invest some resources into looking for the damn things. We do a little of that right now, but not nearly enough, as the strike in Russia a couple years ago proved. This isn't hard; we just need more probes in orbit, or perhaps in Solar orbit closer to the Sun (to spot ones that we can't see from here because the Sun's light drowns them out). Second, we need to develop the capability of deflecting them. With good enough detection, this isn't hard: you just send a big craft up there with some engines (probably ion engines) and a lot of fuel and run them for a long time to push it into a slightly different and safer orbit. If you have enough forewarning, it's not that hard, because a little movement will make a big change in trajectory over a long time. The key here is having enough forewarning; if your detection efforts are so lame that you have very little warning, then you're not going to be able to avert disaster.
Simply put, it'd be a lot easier and cheaper for us to invest in some space-based telescopes optimized for detecting Earth-crossing asteroids than to develop all the technology and infrastructure needed for establishing a colony on Mars. And the end result is better too: instead of some small colony on Mars surviving while the bulk of humanity perishes, along with the most livable planet for humans, we can keep our planet and the entire human race intact.
But if we're too stupid and short-sighted to invest in some telescopes, then maybe we deserve to be wiped out like the dinosaurs.
Hawaii is a really nice place for humans to live: the weather is perfect, it's lush and beautiful, there's all kinds of fun things to do like swimming, surfing, scuba diving, exploring rain forests, etc.
If you found yourself magically transported to Hawaii in prehistoric times, perhaps with a small group of intelligent people, you could pretty easily survive there by living off the land. There's wood for making huts and burning, there's extremely fertile land for farming, there's vegetation that can be eaten, there's fish in the ocean nearby that you can fish, you don't have to worry about freezing to death, the air is clean, etc. Or, in modern times, if you can afford it, it's a great place to live too, especially if you can afford a nice house on the beach.
Mars isn't like that at all. You can't go outside, you can't breathe the thin atmosphere, you'll get radiation sickness, you can't easily grow food, there's no liquid water (humans tend to like bodies of water), etc. Maybe if you really like living underground in an artificial habitat, it'll be a nice place for you to live, but if you like being outside, it'll really suck. I suppose if you could make the underground habitats big enough and Earthlike enough (with giant artificial forests and lakes), it wouldn't be so bad, but that'd be quite a project. It'd be a lot easier to just stop messing up this planet so much.
Unless its growable in a vat, space people aren't going to be getting their protein from 4-legged mammals. Maybe crickets...
Or other space people...
Actually, no, it's "boarders" now. The English language is defined by popular usage, and roughly half the American population believes that "boarder" means "a dividing line" (what you think of as "border"). This is seen in every online message board where the topics of "enforcing the boarder", illegal immigration, etc. comes up. When a large enough fraction of the population makes the same mistake, it become the correct usage.
Maybe if we had some decent public education in this country, this wouldn't have happened.
That's not that much lower. Here on Earth we have things called "clouds" that reduce our usable sunlight; Mars doesn't have those, nor much of an atmosphere to speak of. We also grow food just fine in cooler months (when there's less sunlight per day), especially when we use greenhouses. This isn't like trying to grow food on Pluto.
At the worst, we could build big greenhouses which have sunlight concentrators on the roof, like giant Fresnel lenses. They wouldn't need to concentrate the light that much, since there's only 50% less sunlight than on Earth, so the area of the roof would only need to be 25-50% larger than the area of the farmland (due to the mitigating factors I mentioned above: no clouds, less atmospheric attenuation, selection of grops that need less sunlight, etc.).
I've never understood what moron decided that making things hard to read was a good idea, even for those who still have good eyesight.
That's a stupid argument. The police do not have nuclear weapons.
If you had said something about private citizens having MRAPs and grenade launchers, you'd have a point.
For large values of one, one equals two, for small values of two.