Colloquium Abstract With geopolitical and technological changes driven by the nine nuclear weapons states, we are witnessing a new nuclear arms race and deterioration of the multi-decade arms control regime. This talk will overview basic information on nuclear arms, the current  critical situation, feasible steps to reduce the nuclear threat, and a new project to engage […]

Colloquium Abstract With geopolitical and technological changes driven by the nine nuclear weapons states, we are witnessing a new nuclear arms race and deterioration of the multi-decade arms control regime. This talk will overview basic information on nuclear arms, the current  critical situation, feasible steps to reduce the nuclear threat, and a new project initiated by […]

Colloquium Abstract A nuclear war could inject so much smoke from the resulting fires into the stratosphere that the resulting climate change would be unprecedented in recorded human history. Our climate model simulations find that the smoke would absorb sunlight, making it dark, cold, and dry at Earth’s surface and produce global-scale ozone depletion, with enhanced […]

Colloquium Abstract With the end of the Cold War, the public, activists and our government thought the danger from nuclear weapons was on a glide path to zero and those concerned about existential threats turned to other issues, notably global warming. Unfortunately, we were wrong.  Russia has made nuclear threats to keep NATO from intervening against […]

Colloquium Abstract  Eighty years ago, physicists first worked out what it would take to build a simple nuclear weapon and the immediate effects of its use. Five years later, theory and experiment became devastating facts as the United States built, tested, and then used the first nuclear weapons to destroy cities. Today, there are nine […]

Abstract  The United States, Russia, and China are engaged in the early phases of a new nuclear arms race and Russia and NATO are engaged in a nuclear-tinged war in Ukraine. With the recent shredding of arms-control agreements, the arms races may proceed unfettered and could lead to unprecedented dangers to humanity. On the other […]

Abstract The United States, Russia, and China are engaged in the early phases of a new nuclear arms race, while Russia and NATO are engaged in a nuclear-tinged war in Ukraine. With the recent shredding of arms-control agreements, a three-way arms race may proceed unfettered and could lead to unprecedented dangers to humanity. On the […]

Abstract Despite shrinking significantly at the end of the Cold War, the world nuclear weapon arsenals continue to represent a significant threat to humanity. About 14,000 nuclear weapons are still deployed or in reserve and other 700 intercontinental ballistic missiles are ready to be launched within minutes. Recent trends indicate the risks of nuclear war […]

Abstract The film Oppenheimer barely hints at the debate among the Manhattan Project physicists on “the impact of the Gadget on Civilization” and their efforts to influence the decision on using nuclear weapons against Japan. It also does not explain that Oppenheimer’s “trial” and termination as a government advisor was due to his opposition to […]