Where will you go? Even if Earth is exhausted of all its resources, the two things that Earth will continue to have, is (1) gravity at 9.8 m/s^2, and (2) a mag

Where will you go? Even if Earth is exhausted of all its resources, the two things that Earth will continue to have, is (1) gravity at 9.8 m/s^2, and (2) a magnetic field. It’s possible the magnetic field can be eliminated, if the planet’s core turns solid, in which case, we all need to go underground. But the planet will continue to get sunlight, and it will continue to have gravity. These 2 key things, are found nowhere else in this universe. Except for Venus, which has a similar gravity, but it’s so hot, the surface can melt lead. And we still don’t yet have a high probability of the closest extra-solar planet, that can sustain life with earth-like gravity and a magnetic field. Even an asteroid that eliminated the dinosaurs was still not able to eliminate life on Earth. Why? Because of this water world, its gravity, and its magnetic field. So the best solution to having a backup for humanity, is to probably (1) dig a hole deep in the ground, and establish a deep mine colony there. Or (2) build a deep ocean habitat, and establish a deep marine colony there. That way, if an asteroid hits land, then the deep ocean colony can survive. Or if the asteroid hits the ocean, then the deep mine colony can survive.