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Get to know the great disasters that mankind has known, each of which can cause the entire human race to become extinct. Get to know the five dangerous creatures from the Dark Continent, and how to assess the dangers of each, how dangerous they are, and what methods are used to calculate them. 00:00 Open clip 00:44 The dangers of the Dark Continent 04:28 The five great disasters 11:37 Assessing the dangers of living things 16:35 The level of danger of all the disasters