The super-freakonomics book has been lauded elsewhere in the forum, I'd like to read it but I have spent money on other books I haven't read yet. In the joyous holiday spirit, I'd like to propose another bit of outside-the-box heresy: Suppose the earth's axis was, until relatively recently, where the magnetic poles are? A PBS/Nova hour suggests that a comet air-burst could have caused extinctions and been disguised if it hit ice instead of land, but suppose it hit the north pole at an angle and caused the earth's crust to tilt on top of the rotating liquid-like iron core, and possibly to depress the arctic to create a sea there. The depressing of the arctic could have caused the northern hemisphere continents to rise and so we have more land in the temperate zone here as opposed to south of the equator. Thoughts, anyone?