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


A deadly pulse of ultraviolet (UV) radiation might have performed a task in Earth‘s largest mass extinction occasion, fossilized pollen grains reveal. 

Pollen that dates to the time of the Permian-Triassic mass extinction occasion, roughly 250 million years in the past, produced “sunscreen” compounds that shielded in opposition to dangerous UV-B radiation, the evaluation discovered. At the moment, roughly 80% of all marine and terrestrial species died off. 



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