>Earth might get a flat tire
There is no possible "flat-tire" existential risk scenario which makes moving to Mars cheaper (man hours) than just fixing whatever happened on earth.
IMO that kills the whole thing right off the bat.
There is no possible "flat-tire" existential risk scenario which makes moving to Mars cheaper (man hours) than just fixing whatever happened on earth.
IMO that kills the whole thing right off the bat.
We (complex life) couldn't recover from something like that. Maybe simple life could hide deep in the earth and emerge when it's safe thousands of years later.
That is also the absolute worst case scenario that is theoretically possible, literally a one in a billion year event. That is something we can plan for and build for now with: Anti-Asteroid technology, "Fallout" shelters/biodomes etc... Or hell, a fucking Dyson sphere (or series of them) is a million times easier/better than trying to terraform Mars.
Oh and by the way, Mars has the same risks of Asteroids as earth does so we wouldn't be out of the woods just by being on Mars.
The reality is, people like space shit and want to go to space. There is just no good reason to do it as flesh and blood humans.