An aurora spotted from the International Space Station.

Gigantic radiation storms have been pummeling Earth for at least 10,000 years and could strike again, tree ring analysis reveals

A series of sudden and colossal spikes in radiation levels across Earth’s history could have come from a series of unknown, unpredictable and potentially catastrophic cosmic events, a new study has revealed. 

Named Miyake events after the lead author of the first study to describe them, the spikes occur roughly once every 1,000 years or so and are recorded as sudden increases in the radiocarbon levels of ancient tree rings.

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