Comment on A magnetic field reversal 42,000 years ago may have contributed to mass extinctions by Inversões geomagnéticas e impactos de asteroides em diferentes camadas geológicas e tipos de rochas – Jornal da Ciência

A flip-flop of Earth’s magnetic poles between 42,000 and 41,000 years ago briefly but dramatically shrank the magnetic field’s strength — and may have triggered a cascade of environmental crises on Earth, a new study suggests. With the help of new, precise carbon dating obtained from ancient tree fossils, the researchers correlated shifts in climate patterns, large mammal extinctions and even changes in human behavior just before and during the Laschamps excursion, a brief reversal of the magnetic poles that lasted less than a thousand years.