Editing Circumnavigation (section)

==Definition==
A person walking completely around either pole will cross all [[meridian (geography)|meridians]], but this is not generally considered a "circumnavigation". The path of a true (global) circumnavigation forms a [[loop (topology)|continuous loop]] on the surface of Earth separating two regions of comparable area.{{Citation needed|date=March 2024}} A basic definition of a global circumnavigation would be a route which covers roughly a [[great circle]], and in particular one which passes through at least one pair of points [[antipodes|antipodal]] to each other.<ref>{{cite web|url=http://www.expedition360.com/home/circumnavigation.htm |title=Definition of a Circumnavigation |publisher=Expedition360.com |date=28 September 1924 |access-date =2 July 2012}}</ref> In practice, people use different definitions of world circumnavigation to accommodate practical constraints, depending on the method of travel. Since the planet is [[spheroid|quasispheroidal]], a trip from one Pole to the other, and back again on the other side, would technically be a circumnavigation. There are practical difficulties (namely, the [[Arctic ice pack]] and the [[Antarctic ice sheet]]) in such a voyage, although it was successfully undertaken in the early 1980s by [[Ranulph Fiennes]].<ref name="transglobe">{{Cite web|date=2015-08-18|title=1982: First Surface Circumnavigation via both Geographical Poles|url=https://www.guinnessworldrecords.com/news/60at60/2015/8/1982-first-surface-circumnavigation-via-both-geographical-poles-392920|access-date=2021-01-28|website=Guinness World Records|language=en-GB}}</ref>