Japan has brought the Kashiwazaki-Kariwa nuclear power station back to full operation after resolving an alarm malfunction that had raised fresh questions about safety at the world’s largest atomic ...

Studies of the potential climate effects of nuclear war in the 1980s focused on northern hemisphere, large-scale nuclear conflicts, and predicted more extreme global “nuclear winter” scenarios.

At the outset of the Cold War era, the United States and the Soviet Union rapidly built up large nuclear arsenals as part of the prevailing doctrine of deterrence, under which each nation attempted to ...