Cosmic collision caused medieval radiation burst, theory says

01/22/2013 | Ars Technica · BBC

New research suggests that Earth was hit in the year 774 by a short gamma-ray burst, the result of a collision between two black holes or neutron stars in the Milky Way. The theory, published in the journal Monthly Notices of the Royal Astronomical Society, builds on the discovery last year that the planet was struck by a blast of high energy during the Middle Ages.

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Ars Technica · BBC

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