What happened to the sun over 7,000 years ago?

By analyzing the level of a carbon isotope in tree rings from a specimen of an ancient bristlecone pine, researchers have revealed that the sun exhibited a unique pattern of activity in 5480 BC. By comparing this event with other similar but more recent phenomena, they reported that this event may have involved a change in the sun’s magnetic activity, or a number of successive solar burst emissions.

Source:: What happened to the sun over 7,000 years ago?

      

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