HomeAstronomyUV radiation pulse played a role in a mass extinction event, fossilized...

UV radiation pulse played a role in a mass extinction event, fossilized pollen reveals

A lethal pulse of ultraviolet (UV) radiation may have played a role in Earth’s biggest mass extinction event, fossilized pollen grains reveal. 

Pollen that dates to the time of the Permian-Triassic mass extinction event, roughly 250 million years ago, produced “sunscreen” compounds that shielded against harmful UV-B radiation, the analysis found. At that time, approximately 80% of all marine and terrestrial species died off. 

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