It would be a-crop-alyptic. Amid rising tensions around the world, Penn State University scientists have revealed what the fallout would be from a nuclear war — with an unfathomable famine, mass deaths and a particular impact on an important crop after the bombs went off. According to the dystopian study, published in the journal Environmental Research Letters, the destruction would “extend well beyond the blast zones” because of nuclear winter, a catastrophic theoretical scenario in the wake of a nuke conflict. “Nuclear wars would cause an unfathomable loss of life and genetic resources, but also a prolonged nuclear winter that...