colonizing mars is a horrible idea  should we land on mars and explore it? sure. should we colonize it and birth children there? hell no! mars only has 38% of earth's gravity, 1% of the atmosphere, and 44% of the sunlight. temperatures fall to -153c (-225f) at night. mars core is dead. theres no global magnetic field. the surface is bombarded with 50x the radiation on earth. there is no ozone layer to protect from solar rays. the thin atmosphere cannot burn up meteorites, which hit the surface at full speed. the soil is contaminated with toxic perchlorates. because the atmospheric pressure is only .088 psi (earth has 14.7 psi), your blood would boil and your eyes would explode without artificial pressurization. the entire planet is periodically covered with global dust storms. it is a hellish wasteland. living on mars would be cruel and inhumane torture. you would be trapped inside an underground capsule 24/7. it would be worse than maximum security prison. imagine the boredom after the initial novelty of being on mars wears off. you would never be allowed to go outside without some cumbersome spacesuit. you would constantly have anxiety about your spacesuit or environment leaking. you would never get enough sunlight. your bones and organs would atrophy from low gravity. you'd probably get cancer from the constant radiation, unless you never went near a window. it would be a horrifying existence. human beings were not designed to live like termites. assuming you don't die or go insane, you would experience extreme psychological and spiritual suffering. you would be completely cut off from nature. you would be cut off from all from the human experience. you would struggle to understand culture, poetry, or religion since it's all predicated on earthly existence. you would be 225 million kilometers (140 million miles) away from humankind. the loneliness would be unbearable.
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