The United States maintains the southernmost base, Amundsen–Scott South Pole Station, and the largest base and research station in Antarctica, McMurdo Station. The second-southernmost base is the Chinese Kunlun Station at 80°25′02″S during the summer season, and the Russian Vostok Station at 78°27′50″S during the winter season.
In 2017, there were more than 4,400 scientists undertaking research in Antarctica, a number that fell to just over 1,100 in the winter. There are over 70 permanent and seasonal research stations on the continent; the largest, United States McMurdo Station, is capable of housing more than 1,000 people.
As of early 2019, the IAEA reports there are 454 nuclear power reactors and 226 nuclear research reactors in operation around the world.    In the early era of nuclear reactors (1940s), a reactor was known as a nuclear pile or atomic pile (so-called because the graphite moderator blocks of the first reactor were placed into a tall pile).
On 3 November the Government of Kerala opened its tourism sector by reopening hill stations, beaches, national park, and inter-state public transport movement The Government Of India has decided to open all educational institutions by January 2021 including schools and colleges and universities across India.
Holy Trinity Church (Russian: Церковь Святой Троицы) is a small Russian Orthodox church on King George Island near Bellingshausen Station, a Russian research station in Antarctica. It is one of the eight churches on Antarctica. It is the southernmost Eastern Orthodox church in the world (cf. St. Ivan Rilski Chapel).
The Global Monitoring Laboratory conducts research on greenhouse gas and carbon cycle feedbacks, changes in clouds, aerosols, and surface radiation, and recovery of stratospheric ozone.
In consequence, the Montreal Protocol has often been called the most successful international environmental agreement to date. In a 2001 report, NASA found the ozone thinning over Antarctica had remained the same thickness for the previous three years, however in 2003 the ozone hole grew to its second largest size.