(English) Yun majored in Biology Education at Seoul National University, and has planned and written many science related books that are especially catered towards children and young adults. Yoon is deeply interested in life, the environment, and sustainability. Yoon has written many books including "Hello, Ecosystem!", "Origin of the Species, Revealing the Mystery of Natural Selection", "What Animal Are You?", and has translated books like "Galapagos", "Wild Animals I Have Known", "Professor Farnsworths' Biology Lecture", and "The Most Fun Genetics".

(Indonesian) Ia mengambil jurusan Pendidikan Ilmu Biologi di Universitas Nasional Seoul. Ia telah merencanakan banyak hal yang berhubungan dengan sains serta menjadikannya tulisan. Ia mengabdikan dirinya dalam menulis buku sains untuk anak-anak dan remaja.