The coin's reverse presents images of the bust of Henryk Arctowski and Antoni B. Dobrowolski, and below them there is an image of the Antarctic continent. In the background there is a fragment of an iceberg and the logo of the Polish Antarctic Station.  On the obverse there is an image of the "Belgica" ship decorated with zirconia imitating ice.  Henryk Arctowski was born on 15 July 1871. In 1888 Henryk began studying astronomy at the University of Liege, but moved to chemistry combined with petrochemistry, petrography and mineralogy and geology. To study all these disciplines he went to France, where he attended the Sorbonne, the College de France, the Museum of Natural History and the Mining School. After obtaining his diploma, he returned to Belgium in 1893 and took up scientific and didactic work at the University of Liege. A breakthrough for Arctowski's career and life turned out to be the year 1895, when he was persuaded by Adrien de Gerlache de Gomere, an officer of the Belgian Navy, to take over the scientific management of a research expedition to Antarctica. Antoni B. Dobrowolski became Arctowski's assistant during the expedition to Antarctica, who was to support him during his arduous meteorological research. After the expedition and elaboration of its results Arctowski was active in the organizational and scientific field of geophysical research. In 1899, he was the first to propose the creation of an international project of Antarctic research, and in 1903 he developed a precise scheme of location of meteorological stations around the southern pole.  His interest in climate change and the causes of this change, in which he took into account the role of volcanic ash, sunspots and magnetic storms, resulted in many publications, thanks to which he made contact with outstanding researchers of these problems, including members of The Smithsonian Institution, including the famous Charles Greeley Abott. In 1912 he received the title "Doctor honoris causa" of the University of Lviv.  Henryk Arctowski gained recognition all over the world. He was the author of over 400 scientific papers in many languages, including English and French, presenting the results of polar research and describing the course of expeditions. He died on 21 February 1958 in Washington. His wife died in May. Their ashes were brought to Poland in 1960 and deposited at the Powazki Cemetery in Warsaw. Many sites and geographical formations in Antarctica and the Arctic have been named after the Polish explorer.  Antoni B. Dobrowolski was born on 6 June 1872. He was the founder of a new field of science - cryology, a science dealing with ice, generally speaking. He was also involved in geophysics and glaciology. He initiated modern glaciological research in Poland, which dealt with issues concerning the formation, development and melting of glaciers and their influence on the sculpture of the Earth's surface, climatic conditions and the type and shape of the ground on which glaciers are formed and developed. In 1897 Dobrowolski became a participant of the famous "Belgica" expedition, during which extensive scientific research was conducted in Antarctica. At that time he was an assistant of another outstanding Polish scientist, Henryk Arctowski.  Dobrowolski conducted most of his research in Antarctica. He was the first to describe the halo phenomenon in a scientific manner. After many observations, Dobrowolski characterized and classified clouds according to: thickness, density, cohesion, form and structure. In addition, he described a hundred different cloud systems and thus contributed to a gigantic progress in meteorology. As a creator of cryology, it is clear that Dobrowolski is also the author of the first definition of snow. In 1927 he became director of Aerological-Military Department of the State Institute of Meteorology. He also initiated the creation of Observatories: Maritime, Seismological and Aerological Observatories.