Polii magnetici s-au inversat de mai multe ori de-a lungul istoriei planetei noastre. Astfel, în urmă cu aproximativ 800.000 de ani, nordul magnetic se afla deasupra Antarcticii, iar sudul magnetic se afla suprapus nordului geografic.
Dacă inversarea polilor magnetici ar putea produce o serie de neplăceri de ordin tehnic, cu siguranță că ea nu reprezintă un motiv de panică. Oamenii de știință au căutat eventuale urme ale unor catastrofe ce ar fi putut să se producă în timpul unor astfel de inversări și nu au descoperit nimic alarmant.
Cel mai afectat va fi sistemul de transport al energiei electrice. Însă, din punct de vedere teoretic, dacă acest câmp magnetic ajunge să fie extrem de slab și chiar dispare temporar, în timpul inversării, atunci Pământul ar putea fi expus unor niveluri periculoase de radiații solare și cosmice care ar putea afecta serios biosfera și ar pune în pericol viața oamenilor.
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