About 1200 years ago, Earth may have experienced one of the rarest and most powerful cosmic events a planet can be exposed to: a gamma-ray burst. If it did, well, let’s just say that we, as living things on Earth, are lucky it wasn’t worse.
Hosted by Caitlin Hofmeister
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http://mnras.oxfordjournals.org/content/early/2013/01/08/mnras.sts378.full
http://www.space.com/19340-tree-ring-mystery-gamma-ray-burst.html
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http://www.popsci.com/science/article/2013-01/huge-burst-gamma-rays-hit-earth-and-no-one-noticed
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https://www.ras.org.uk/news-and-press/224-news-2013/2215-did-an-8th-century-gamma-ray-burst-irradiate-the-earth
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