What would possibly happen if we detonated every single nuclear warhead on earth at the same time, at one place? There are more than 15,000 nuclear weapons currently on Earth. It is believed that the US and Russian arsenals are individually capable to a complete wipe-out of life from Earth. While the United States of America has about 6,900 nukes, Russia has above 7,000. The average yield of the Russian nukes is about 700-800 kiloton TNT equivalent, each. The question here is, what "can" happen if every single warhead on earth is stockpiled at one place and and detonated at the exact same time?
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