Abandon ship, or fix it?

Should we fix earth or just colonize another planet? As NASA and Elon Musk continue to spend top dollar on space exploration, talks of living on planets outside our earth are filtering into the air. In fact, Elon Musk said that the cost of moving to Mars with a free return ticket would be around $500,000 or lesser in the future. Ok, but, what happens if we are successful men those planets? Where do we start from? How do [...]