Noted naturalist and prolific writer Prof Dwijen Sharma passed away at Square Hospital on Friday morning.
He was 88 years old.
Various news outlets and his close friends confirmed the matter.
Dwijen had long been sufferings from various old age complications, and undergoing treatment at the Intensive Care Unit (ICU) of Birdem Hospital since August 30. He was shifted to Square Hospital on Thursday.
Prof Dwijen was born in May 29, 1929 at Shimulia village of Barlekha upazila in Moulvibazar.
He had received numerous awards, including the state's highest civilian honour - Ekushey Padak - in 2015 for his outstanding contribution to science, education and nature conservation in Bangladesh.
His famous books include Shamoli Nishorgo (Green Nature), Shomajtontre Boshobash (Living in Socialism), Jiboner Shesh Nei (No End To Life), Phoolgulo Jeno Kotha (Each Flower Is A Word), Biggan Shikkha O Daiboddhotar Nirikh ( Science Education and Our Responsibilities), and Nishorgo Nirman O Nandonik Bhabna.