Did a gamma-ray burst initiate the late Ordovician mass extinction?

@article{Melott2004DidAG,
  title={Did a gamma-ray burst initiate the late Ordovician mass extinction?},
  author={Adrian L. Melott and By Offer Lieberman and Claude Laird and L. D. Martin and Mikhail V. Medvedev and B. Thomas and John K. Cannizzo and Neil Gehrels and Charles H. Jackman},
  journal={International Journal of Astrobiology},
  year={2004},
  volume={3},
  pages={55 - 61}
}
Gamma-ray bursts (GRBs) produce a flux of radiation detectable across the observable Universe. A GRB within our own galaxy could do considerable damage to the Earth's biosphere; rate estimates suggest that a dangerously near GRB should occur on average two or more times per billion years. At least five times in the history of life, the Earth has experienced mass extinctions that eliminated a large percentage of the biota. Many possible causes have been documented, and GRBs may also have… Expand
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