Amazing photos of countries from space
These satellite images provide the ultimate view of some of the world's most interesting places.
(Photo: NASA )
Antarctica is not controlled by a single nation. Different regions of the continent are administered by different countries, all of whom work under a 1959 treaty that bans using the land for military purposes or mining and limits further claims. Each of the 30 countries that signed the treaty has at least a seasonal research station on the continent. Many have personnel on their research bases year-round.
Because the continent is shrouded in darkness for part of the year, some of the best images are enhanced by radar sensors, which can see through clouds and aren't limited by a lack of light.