09/12/2022
Earth's magnetic field reverses over time
Responsible for keeping Earth safe from the ravages of solar winds, the Earth's magnetic field is largely the reason life can survive here. But, for reasons not fully understood, this field weakens, collapses, and reverses from time to time.
Occurring on cycles of around 3 to 4 times every million years, it is unclear if this poses a potentially serious problem for life on Earth. It has happened so often, for so long, that it appears to have never caused large-scale extinctions, though some claim it may.
However, in our modern, technologically dependent civilization, the next one might be pretty serious for us all.