This is a bit concerning.
Basically, every few hundred years the earth is hit by a solar flare powerful enough to pretty much destroy all modern tech, and probably give anyone flying in a plane at the time cancer.
These are much bigger than the Carrington Event, which was the last really big solar flare recorded.
One day, without warning, the sun will just wipe out tech slate clean.
And there is apparently nothing we can do about it.
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