Deadly “red sky” solar storm from 800 years ago discovered in ancient trees

ScienceDaily
May 14, 2026, 1:55 am53 ptsTrending
Researchers in Japan traced a hidden medieval solar storm using ancient tree rings and centuries-old sky observations. The team linked reports of eerie red auroras with spikes of carbon-14 trapped in buried wood, revealing a powerful solar radiation event around 1200 CE. The findings suggest the Sun was far…

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