How can I forget. That was the first time I saw the northern light. The temperature just hit below 30℃. It took a tremendous effort to keep my eyes open because not only I was very tired from my 13 hours of flight but also both of my eye lashes were frozen and stuck together. I was looking at the subtle flow of lights on the sky. I wished I had a photographic memory. It was the moment I'd like to remember for the rest of my life.