During the Cold War, the United States carried out terrifying classified experiments involving nuclear explosions in space, ...

As the threat of a nuclear war intensifies, the terrifying reality of what could happen after the bombs explode may cause more fear than the initial cataclysm. For decades, worst-case scenarios have ...

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.

Editor’s note: This is part of the “Nuclear winter: Why study it now?” series. In November of 1981, atmospheric chemist Paul Crutzen and I sat in his office at the Max Planck Institute in Mainz, ...