https://scitechdaily.com/mass-extinction-traced-to-ozone-depletion-fossil-pollen-sunscreen-evidence-emerges/
Scientists from China, Germany, and the UK led by Prof. LIU Feng from the Nanjing Institute of Geology and Palaeontology of the Chinese Academy of Sciences (NIGPAS) have revealed that pollen preserved in 250-million-year-old rocks contains abundant compounds …
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