Barenaked Ladies

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Our whole universe was in a hot, dense state 
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Then nearly fourteen billion years ago expansion started, wait 
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The earth began to cool, the autotrophs began to drool 
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Neanderthals developed tools 
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We built a wall (we built the pyramids) 

Math, science, history, unraveling the mystery 
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That all started with the Big Bang 
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Bang!