Saw a documentary on an air force study from the late 40's. Presented as fact that the poles in theory could flip. Guess when? When asked to confirm the air force would neither confirm nor Deny the report. In essence magnetic north was continuing on a path to geographic north. Where able to make the calculation from as far back as 1400's for maritime logs. It essensually said that at the time, magnetic north was 200 miles closer than at the time of the first records. Does anyone think they stopped the study?
History channel, TLC, or NGC.