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Einstein's Theory of General Relativity


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How are spacetime, dark matter and gravity related? In celebration of the centennial of Einstein's theory of general relativity, this video breaks it down. 

The source video for this lesson was created by Jamie LochheadEoin Duffy and Anaïs Rassat.

Disclaimer: This video contains curse words and some strong language which may be unsuitable for younger audiences.

According to Einstein, the universe is expanding away from the site of an initial 'big bang', but the universe is expanding much more rapidly than Einstein predicted. What theory have physicists invented to explain this? 

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