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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in 2-3 sentences, explain the big bang theory
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the big bang theory is the prevailing cosmological model which describes how the universe began. it postulates that the universe was initially formed in a hot, dense state and subsequently expanded, cooling and evolving over time into the structure we observe today. it is supported by a large body of observational evidence.
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