The sum total of human activity in the last 100 years also eclipses the sum total of all human activity prior (300k years worth). Humanity didn't do a lot for a

The sum total of human activity in the last 100 years also eclipses the sum total of all human activity prior (300k years worth). Humanity didn't do a lot for a long time. But yes, Mars would be a mega project. Isaac Arthur does great stuff on Youtube which gives an idea of the magnitude of the works necessary. https://www.youtube.com/watch?v=kmFOBoy2MZ8 https://www.youtube.com/watch?v=kmFOBoy2MZ8