Some 41,000 years ago is not only the age of the Campanian-Ignimbrite eruption and the sudden arrival of people with Aurignacian culture (most probably Homo sapiens) to the heartland of Paleolithic Europe: the Franco-Cantabrian region, sealing the fate of our Neanderthal cousins.
Some 41,000 yeas ago is also, we are told now, the date of the latest polarity reversal of planet Earth.
Researchers from the German Research Centre for Geosciences (GFZ), Norbert Nowaczyk and Helge Arz, have found that around that date, any hypothetical compass would have been for some 440 years (est.) completely lost. Some of that time the compasses would have pointed South and the rest the magnetic field was so messed up that failed its normal role of protection against solar radiation, which was then surely rather dangerous for life on Earth.
|The North Pole went mad, then the Phlegrean Fields erupted|
Reference study: Nowaczyk, N. R.; Arz, H. W.; Frank, U.; Kind, J.; Plessen, B. (2012): "Dynamics of the Laschamp geomagnetic excursion from Black Sea sediments" Earth and Planetary Science Letters (pay per view), 351-352, 54-69. doi:10.1016/j.epsl.2012.06.050