A CURIOSITY ABOUT THE GREENWICH MERIDIAN

If you travel to Greenwich, stand on the famous Prime Meridian Line -- which is marked with a physical line and a sculpture at the Royal Observatory -- and look at your GPS, it won't read 0° longitude. It'll be slightly out. Who's right? And why?
(Tom Scott)


Watch this video if you want to know 

Why The Prime Meridian Isn't At 0º!!!