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Continue to ChatLondon calling - Royal Observatory (where modern time keeping began) https://planettraveller.blog/2018/08/26/london-calling-royal-observatory-where-modest-time-keeping-began/
London calling - Royal Observatory (where modern time keeping began) https://planettraveller.blog/2018/08/26/london-calling-royal-observatory-where-modest-time-keeping-began/