No one owns Antarctica but seven countries have made claims, including Argentina, Australia, Chile, France, New Zealand, Norway, and the UK, Australia has the biggest claim. Some of these claims overlap each other.
All land on earth south of 60 degrees S is under the governance of the Antarctic Treaty. The treaty lists these land claims, holds them in abeyance and prohibits future claims by any nation-state.
There is no ownership of an 'Antarctica post office'. Each research station organizes the logistics of sending and receiving mail.
Antarctica, all the other continets have partial ownership of Antarctica
No land south of 60 degrees S on earth is 'owned' by anyone, nation-state or otherwise. All this land is governed by the Antarctic Treaty, which specifically holds all existing land claims in abeyance, and prohibits future land claims. Ownership of Antarctica is not important, because the phenomenon does not exist.
Russia is the biggest country in the world at 17,075,400 sq km. Antarctica is not a country but a territory, with disputed ownership. Besides, it is only 13,209,000 sq km.
All humans benefit from the Antarctic Treaty, which governs all land south of 60 degrees S, including Antarctica. Ownership is non-essential to the scientific work accomplished on the continent.
Antarctica is a condominium in the sense of ownership, and the governing document is the Antarctic Treaty. Australia, Great Britain, Chile, Argentina, New Zealand, France, Norway -- to name a few -- are all in agreement as to the use of the land on earth south of 60 degrees S, which includes the continent of Antarctica.
Antartica has no gernment. It signed a peace treaty with 12 other countries saying that no one has a ownership right to any of Antartica's land.
Antarctica doesn't have an official currency. There is no nation state to establish currency, postage stamps, flags or other items showing national ownership. Any currency, stamps, flags or so forth that purport to be 'official' anything from Antarctica are souvenirs crafted by clever entrepreneurs.
No, no nation owns any part of Antarctica. Several nations have territorial claims on the continent -- not USA, however -- some of which overlap each other. The Antarctic Treaty (1960) holds all claims in abeyance and forbids any other future claims.
The Antarctic Treaty specifically forbids ownership of any territory on the Antarctic continent by any country. The treaty acknowledges claims made by several countries, some of which overlap, and renders them moot. The treaty also prevents additional territorial claims.
There is no sovereignty in Antarctica, and so any flag you see has been developed and sold by a souvenir-selling profiteer. That person can explain to you what the colours of that souvenir represent. Antarctica is governed by the Antarctic Treaty, which is a form of condominium ownership. There is no government to issue a flag, currency or postage stamps.
There is no one country that owns Antarctica and no permanent human settlers or any evidence of and existing or pre-historic indigenous population. In 1961 a treaty was established on the ownership of Antarctica. 45 countries (¾ of the world population) have signed the treaty to agree on the claims and the treatment of Antarctica. This treaty is one of the only international 20th century agreements to have succeeded. The Antarctic treaty bans all military activity. Every decision that the treaty makes is made by consensus so that there are no disagreements and arguments. In the 1980's mining companies wanted to search for minerals in Antarctica. Some environmental groups such as green peace campaigned that mining should be banned forever in Antarctica. At first the treaty could not come to a decision, but eventually they agreed to put in place a new protocol on environment protection in 1998. The rules of the protocol are that wildlife and habitats must be conserved and pollution controlled. There are seven countries that have made claims: Argentina, Australia, Chile, France, New Zealand, Norway, and the UK, though Australia has the biggest claim. Russia and the USA have tried to make claims but they have not yet been accepted.