[inquest]

Mars has a rotating iron core but no mag field.

This is the first I've heard of this. Apparently it doesn't have much of an active core, or there'd be plate tectonics. Is it just a solid core, or is there liquid churning as well?

[RightWhale]

Mars is smaller than earth, so the dynamics would be less. There is talk of restoring Mars's mag field so there would be a shield against solar storms, but this is associated with restoring Mars's atmosphere somehow. Why don't we put 2 and 2 together?