"Doomsday scenarios" refer to hypothetical events that could lead to the end of civilization or significant global catastrophe. These scenarios often include natural disasters, such as asteroid impacts or supervolcanic eruptions, as well as human-made threats like nuclear war or climate change. They are often discussed in popular culture, science fiction, and academic studies to explore the potential risks facing humanity. Many doomsday scenarios are based on scientific predictions and historical events. For example, the nuclear threat during the Cold War raised concerns about global annihilation, while climate change poses long-term risks to ecosystems and human societies. Understanding these scenarios helps in planning and preparedness efforts to mitigate potential disasters.