The idea is not to abandon Earth for Mars, rather it is to ensure that human life does not cease to exist. It's very unlikely for a meteor or nuclear war to kil

The idea is not to abandon Earth for Mars, rather it is to ensure that human life does not cease to exist. It's very unlikely for a meteor or nuclear war to kill us all, but why risk it when we are capable of starting a colony now? Everything I've said is much better summed up in this article. http://waitbutwhy.com/2015/08/how-and-why-spacex-will-colonize-mars.html http://waitbutwhy.com/2015/08/how-and-why-spacex-will-coloni...