The place where TIME began | A history of GMT
On location at Royal Observatory, Greenwich in southeast London, HistoryExtra's Elinor Evans unpacks how astronomers, mathematicians, and global powers collaborated to create Greenwich Mean Time (GMT).

Long before smartphones and digital clocks, time was a local affair, creating chaos, confusion and even danger. On location at Royal Observatory, Greenwich in southeast London, HistoryExtra's Elinor Evans unpacks how astronomers, mathematicians, and global powers collaborated to create Greenwich Mean Time (GMT).
Joined by Louise Devoy, Senior Curator of the Royal Observatory, Greenwich, we investigate the milestone innovations in this story, including the story of the Observatory Time Ball, the Shepherd Motor Clock, and George Biddell Airy's meridian Prime Meridian.
From solving longitude at sea to defining timezones for the entire planet, this is the story of how we learned to master time.
Find out more about the history of time, space and navigation and plan a visit to the Royal Observatory
Authors
Elinor Evans is digital editor of HistoryExtra.com. She commissions and writes history articles for the website, and regularly interviews historians for the award-winning HistoryExtra podcast

