Terraforming Mars
Mars was probably hit by a Pluto-sized meteor in the northern hemisphere about 4 billion years ago. It really walloped the planet stripping off its atmosphere and knocking back the rapid spin of the inner core which ended the planetary dynamo generating the protective magnetic field (magnetosphere). If we want to try some creative geoengineering this is one of the first places we should look at. I am not a scientist and these are my current layperson opinions only. The northern hemisphere of Mars has the least severe weather. We might be able to place a few extreme experimental stations there by tunneling into the south side of small hills. If we strengthened the cave walls with reinforced concrete and put a strong framed three layer glass window wall on the south opening we could pump up the inside environment to maybe one-half atmosphere pressure (about 8 psi) and keep it at 60 degrees Fahrenheit so you could walk around inside without a space suit. When the carbon dioxide dry ice