> One of the leading hypotheses for the Ordovician mass extinction, the second largest ever, was a stray gamma ray burst. Wikipedia currently characterizes it

> One of the leading hypotheses for the Ordovician mass extinction, the second largest ever, was a stray gamma ray burst. Wikipedia currently characterizes it as more of a trailing hypothesis: A minority hypothesis to explain the first burst has been proposed by Philip Ball,[100] Adrian Lewis Melott, and Brian C. Thomas ... Although the gamma-ray burst hypothesis is consistent with some patterns at the onset of extinction, there is no unambiguous evidence that such a nearby gamma-ray burst ever happened. https://en.wikipedia.org/wiki/Late_Ordovician_mass_extinction#Gamma-ray_burst https://en.wikipedia.org/wiki/Late_Ordovician_mass_extinctio...