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vor 13 Jahren
Tree-ring data from A.D. 774 show a sudden spike in radioactive
carbon 14, pointing to a burst of charged particles or high-energy
radiation that struck Earth. A relatively nearby gamma-ray burst
could be the culprit. John Matson reports
carbon 14, pointing to a burst of charged particles or high-energy
radiation that struck Earth. A relatively nearby gamma-ray burst
could be the culprit. John Matson reports
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