Editing Extremes on Earth (section)

==Centre==
{{Main|Geographical center of Earth}}
{{Other uses|Axis mundi}}
Since the Earth is a [[spheroid]], its centre (the [[core of the Earth|core]]) is thousands of kilometres beneath its [[Crust (geology)|crust]]. Still, there have been attempts to define various "centrepoints" on the Earth's surface.
* The '''centre of the standard geographic model''' as viewed on a traditional world map is the point 0°, 0° (the [[coordinates]] of zero degrees latitude by zero degrees longitude), which is located in the [[Atlantic Ocean]] about {{cvt|614|km}} south of [[Accra]], [[Ghana]], in the [[Gulf of Guinea]]. It lies at the intersection of the [[Equator]] and the [[IERS Reference Meridian|Prime Meridian]], is marked with a buoy, and is sometimes called [[Null Island]]. However, the selection of the Prime Meridian as the 0° longitude meridian depended on cultural and historical factors and is therefore geographically arbitrary (any of the Earth's meridians could, in principle, be defined as 0° longitude); consequently, the position of the "Null Island" centrepoint is also arbitrary.
* The '''[[Centre of population#World|centre of population]]''', the place to which there is the shortest average route for every individual human being in the world, could also be considered a "centre of the world". This point is located in the north of the [[Indian subcontinent]], although the precise location has never been calculated and is constantly shifting due to changes in the distribution of the human population across the planet.