this post was submitted on 13 Aug 2025
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Today I Learned (TIL)

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The original was posted on /r/todayilearned by /u/trubol on 2025-08-13 09:12:26+00:00.

Original Title: TIL the line where tourists take photos at the Royal Observatory Greenwich marks the historic Prime Meridian. Since 1988 the current standard prime meridian is 102.5m off the original line, hence if you look at your GPS on your phone at the historic line it won't show exactly zero degrees longitude

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