I was exposed to the flat earth theory recently. I watched a video called "the Globe's End. The New Distance to horizon" which puzzled me. Could someone please explain this observation. In the video at 1:49 the shot freezes on Gunnison Island. I did research most of the relevant information I believe. I would like someone to explain to me why this island is visible. The data I found. The camera is 5 ft. 3 inches above the surface of the lake, the highest elevation of Gunnison Island is 165 ft. above the surface of the lake, Gunnison Island is 36.75 miles from the camera. I contacted the maker of this video and got the following information as well. The video was taken on August 17, 2017. The time of day was 8:15 pm. The air temperature was 86 degrees. The barometric pressure was 29.98. The humidity was 17%. The water temperature was 79 degrees. According to the earth curvature calculator 768 feet should be obscured by the curve of the earth taking into account the height of the camera. This calculator does not factor for refraction. I am assuming as the temperature of the lake and the air temperature are quite close that there would not be a large temperature gradient. I have run standard refraction calculations and come up with an approximate refraction coefficient of .18. Obviously this is not nearly sufficient to bend the light enough to allow the island to be visible from the camera location. I am assuming that somewhere in here, and most likely having to do with the temperature gradient, I have missed something that is glaringly obvious. Would someone please run these numbers and give me a rational explanation for this observation. I am assuming there is one. I am not familiar with refraction other than a brief exploration of the topic over the last couple of days. This is in all likelihood the deficiency that has led me to not find the answer on my own. I appreciate your help on this matter. This issue has gotten under my skin and I wish to be done with it. Thanks in advance for your help. A final note is that I made my way to this video as the person who produced it is part of my circle of friends and family. He is known to be an honest and intelligent person of high moral character. Therfore I would not assume that he has represented any details in this video. I assume the mistake is one that that I have made.