An aurora spotted from the International Space Station.

Huge radiation storms have hit Earth for at least 10,000 years and could strike again, analysis of tree rings reveals

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

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

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