核威胁、气候变化等因素使“末日之钟”指针拨快4秒

Core Insights - The Bulletin of the Atomic Scientists has moved the "Doomsday Clock" forward by 4 seconds, now standing at 85 seconds to midnight, the closest it has been since its inception, indicating unprecedented threats to human civilization [1] - The magazine highlights a decline in global consensus, which is weakening the international cooperation necessary to address risks from nuclear warfare, climate change, biotechnology misuse, and potential threats from artificial intelligence [1] - The Bulletin calls for immediate action to limit the scale of nuclear weapons, establish international guidelines for the use of artificial intelligence, and create multilateral mechanisms to address global biosecurity threats [1] Historical Context - The "Doomsday Clock" was originally set at 23:53 when established in 1947 and has been adjusted multiple times, with the furthest point from midnight being 23:43 in 1991 after the Cold War [2] - The last adjustment prior to the current one was in January 2025, when it was set at 89 seconds to midnight [2]