A theory about why it gets dark at night was ignored for 200 years. But it’s just been proved right http://buff.ly/2dUTSKj

October 15, 2016

A theory about why it gets dark at night was ignored for 200 years. But it’s just been proved right http://buff.ly/2dUTSKj

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October 15, 2016 at 09:31AM

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