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The earth is doomed, it's up to humans to get them off this rock that will eventually burn up in one way or another.

• palata 4y ago
  Do you realise that the Sun "threat" is not for another few billions of years (with a "b")? Dinosaurs appeared what, 250 millions years ago (with an "m")? And there's more: the closest star, Proxima Centauri, is more than 4 light-years away. It means that if you want a chance to survive the Sun, you don't need engineering; you need theoretical physics. You need a fundamental discovery in physics to make that kind of travel realistic. At which point the engineering you will have put to go to Mars will possibly don't apply at all. Again: there is no planet B unless you make a fundamental discovery in theoretical physics. People need to stop pretending that going to Mars is a need. It is an artistic performance. It is cool, but mostly useless.