A massive burst of gamma rays produced by the explosion of a star almost two billion light-years away was so powerful that it changed Earth’s atmosphere, according to scientists. Gamma rays are ...

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Highly energetic explosions in the sky are commonly attributed to gamma-ray bursts. We now understand ... When these jets are directed toward Earth, we can observe them from vast distances ...

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that here on Earth we typically detect strong gamma-ray bursts only from the detonation of nuclear bombs. The earth's atmosphere blocks most gamma rays from space, so gamma-ray astronomy was not ...

26 issue of the journal Nature. In the past four years, the team of astronomers working at the Smithsonian's Fred Lawrence Whipple Observatory in Arizona has observed high-energy gamma-ray bursts ...

Earth would be vulnerable to intense UV radiation, which would devastate microorganisms like algae. This could lead to ecosystem collapse and a potential mass extinction event. Gamma-ray bursts ...