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Before atomic clocks, people relied on more accurate timekeepers to set their own. Ruth Belville, known as the “Greenwich Time Lady,” would collect the correct time daily from the Royal Observatory and travel across the city, helping clients sync their clocks to Greenwich Mean Time. Watch more:

15,664 views • 1 year ago •via X (Twitter)

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🇬🇧 Every clock on Earth is set to one place. Every time zone starts there. Every GPS satellite is guided by it. Every flight, every trade, every second measured anywhere on the planet traces back to one place. A small building on a hill in south-east London. In 1675, ships were vanishing. Not from storms. From not knowing where they were. You could read the stars and find how far north you'd gone. But east or west? Nobody had solved it. Thousands of sailors died because nobody on Earth could answer one question. Where are you? Britain built an observatory at Greenwich to find out. And a self-taught carpenter from Yorkshire named John Harrison spent his life solving it. He built a time piece so precise it kept perfect time across months at sea. For the first time in history, a captain could know exactly where his ship was. British ships carried the answer to every ocean on Earth. By 1884, seventy-two percent of the world's shipping already used Greenwich as their reference point. The world hadn't been asked to choose Britain. It just did. Twenty-five nations came together in Washington and voted to make it official. The world would set its clocks to a building in London. France abstained. Then quietly adopted it anyway. Today, every second on Earth is still measured from that building. Every time zone. Every satellite. Every phone in your pocket syncs to a line drawn through a hilltop in south-east England. Britain didn't just keep time. She gave it to the world. Be Proud Of Us. 🇬🇧 Be Part of us 👇 Sources, support and more at 🙏

Proudofus.uk

189,718 views • 4 months ago