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Which London observatory marks the historic Prime Meridian?
Confirmed
The Royal Observatory, Greenwich
In 1884 an international conference chose the Greenwich meridian as the world's 0 degrees longitude.
Which two countries are doubly landlocked, meaning every neighbor is also landlocked?Which country has the only non-rectangular national flag?On which two continents does Istanbul sit?Which country is also a whole continent?Where does the name 'Canada' come from?Which South American country is named after a line around the globe?