다음 채널에서 시청 가능: Investigation Discovery, Food Network, Science Channel, Discovery, TLC, Travel Channel, HGTV, Prime Video, discovery+, Hulu, Sling TV, HBO Max, Animal Planet, Philo
시즌 1, 에피소드 4: NASA astronaut Mike Barratt, describes photographing a strange ring in the ice on the world's oldest and most mysterious lake from the International Space Station. More rings on Lake Baikal have been seen since, they baffle scientists.
Documentary · 2015년 3월 3일 · 41분