<human>: How did the atom bomb affect the world?
<bot>: The atomic bombing of Hiroshima and Nagasaki had a profound effect on the world. It was the first time that humans had used nuclear weapons, and it marked the beginning of the end of World War II. The bombings killed more than 200,000 people in Hiroshima and 70,000 in Nagasaki, and caused widespread destruction to both cities. They also helped to bring an end to the war, as Japan surrendered shortly after the bombings.