as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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give a short explanation of the big bang theory.
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the big bang theory is the cosmological model that describes the origin of the universe, which is believed to have occurred over 14 billion years ago. it is proposed that the universe rapidly expanded from a hot and dense state, and continues to expand today.
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