05-25-2017, 04:11 PM
michaelb wrote:
Not my area of expertise, but are you joking about the "neat" part? I didn't think the reversal would happen quickly, but instead take many years, and we would not be adequately protected from the bombardment of cosmic rays during that transition.
Not my area of expertise either but it is theorized that reversals do not happen suddenly and that while we do have geological records of magnetic field changes we don't have records of mass mutations, which, barring the earth's continuing spinning and generating a magnetic field there isn't much evidence to prove that the earth has ever gone without a magnetic field of some sort and therefore has always maintained a minimum of protection.