The stock market crash took place. This time was also known as the great depression. After America's stock market crashed, so did more than half the worlds as well.
That would be Adolf Hitler, as stated in this source (History.com) "Hitler appointed a new Nazi government, and on March 13 the Anschluss was proclaimed. Austria existed as a federal state of Germany until the end of World War II, when the Allied powers declared the Anschluss void and reestablished an independent Austria."
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specifically Mexico City. cities near mountains with particularly problematic smog problems.
so mexico city
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there is no real specific answer because if you believe in religion such as islam then you will believe that god made the earth and if you don't then you might believe in the big bang theory
Explanation:
which doesn't really explain much apart from an "explosive force" creating the world