The Bulletin of the Atomic Scientists has adjusted the symbolic Doomsday Clock, a representation of the perceived likelihood of a man-made global catastrophe. This year’s adjustment reflects an ongoing evaluation of threats including nuclear proliferation, climate change, and advancements in biotechnology. The movement of the clock serves as a commentary on the current state of global security and technological risk. The clock is not intended as a definitive prediction of the end of the world, but rather a gauge of global vulnerabilities.