[recusancy]

Has he ever talked about how people would survive on Mars without a magnetosphere?

[scrumbledober]

most likely using martian soil as a radiation shield. Either built up in mounds around structures, or by tunneling under the ground (boring company?)

[kuprel]

Is a magnetosphere what would contain the atmosphere? I remember reading that if someone did nuke the poles the atmosphere would escape anyway

[dnate]

living under big shields perhaps?