If it makes you feel any better, Mars is kinda a non-starter. It’s only about 1/4 to 1/3 the mass of The Earth. That low of a gravity well would do nasty things to human health, long term. The only way I can figure to fix that, is to either magic up a way to make a black hole with a diameter of about the size of a US cent and figure a way to secure it to the center of the core of Mars, or hurl asteroids at Mars to make up the difference in mass.
Venus would actually be much easier. It’s already between 0.9 to 0.97 the mass of The Earth, so we just need some ice asteroids to create water on the planet, and then some cyanobactera and maybe a solar shade, and we’ll have a warmer Earth-like planet in several hundred thousand years.
If it makes you feel any better, Mars is kinda a non-starter. It’s only about 1/4 to 1/3 the mass of The Earth. That low of a gravity well would do nasty things to human health, long term. The only way I can figure to fix that, is to either magic up a way to make a black hole with a diameter of about the size of a US cent and figure a way to secure it to the center of the core of Mars, or hurl asteroids at Mars to make up the difference in mass.
Venus would actually be much easier. It’s already between 0.9 to 0.97 the mass of The Earth, so we just need some ice asteroids to create water on the planet, and then some cyanobactera and maybe a solar shade, and we’ll have a warmer Earth-like planet in several hundred thousand years.
Aliens are lucky that space hates humans so much!