New book named ‘Pragoitihasik durjog o gono biluptir upakkhan’ (প্রাগৈতিহাসিক দুর্যোগ ও গণবিলুপ্তির উপাখ্যান) author Dr. Raman Kumar Biswas is going to publish in Book fair 2023 by the Royal pubcations. The book is about the ancient history of the Great dyeing event of Permian Triassic mass extinction at 251.94 million years ago 🦣 in which more than 90 percent of marine species and 70 of land species died out. This book shortly discuss the ancient five big mass extinction events. The Ordovician Silurian mass extinction 🦣, late Devonian mass extinction 🦣, the frasnian faminian mass extinction, the Permian Triassic mass extinction, the end Triassic mass extinction, the Cretaceous Palaeogene…