On August 6 and 9, 1945, the Japanese cities of Hiroshima and Nagasaki lit up with the light of a thousand suns. Two nuclear bombs dropped on these cities literally erased all life for hundreds of kilometers around these cities. That's when people first thought about what would happen if someone threw a bomb back. What will happen as a result of a global nuclear conflict? What will happen to humans, to the planet, will life remain on earth? And if it remains, what kind of life will it be? The best physicists of the world tell about the history of the creation of a nuclear bomb, the mechanism of action of nuclear weapons and a nuclear winter.