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Chernozem (from Russian: чернозём, romanized: chernozyom, IPA: [tɕɪrnɐˈzʲɵm]; "black ground"), [1] [2] also called black soil, regur soil or black cotton soil, is a black-colored soil containing a high percentage of humus [3] (4% to 16%) and high percentages of phosphorus and ammonia compounds. [4] Chernozem is very fertile soil ...
The area contains a biosphere nature reserve called Central Black Earth Nature Reserve (42 km 2 (16 sq mi)). It was created in 1935 within the Kursk and Belgorod oblasts. A prime specimen of forest steppe in Europe, the nature reserve consists of typical virgin land ( tselina) steppes and deciduous forests. Juozas Vareikis [ ru] was the First ...
"Old Black Joe" is a parlor song by Stephen Foster (1826–1864). It was published by Firth, Pond & Co. of New York in 1860. Ken Emerson, author of the book Doo-Dah! (1998), indicates that Foster's fictional Joe was inspired by a servant in the home of Foster's father-in-law, Dr. McDowell of Pittsburgh.
Sagittarius A*, abbreviated Sgr A* ( / ˈsædʒ ˈeɪ stɑːr / SADGE-AY-star [3] ), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way. Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster ...
Synonyms. Euarctos americanus. The American black bear ( Ursus americanus ), also known as the black bear, is a species of medium-sized bear endemic to North America. It is the continent's smallest and most widely distributed bear species. The American black bear is an omnivore, with a diet varying greatly depending on season and location.
Malcolm X described the difference between the "Black revolution" and the "Negro revolution", he contrasted the "house Negro" and the "field Negro" during slavery and in the modern age, and he criticized the 1963 March on Washington. "Message to the Grass Roots" was ranked 91st in the top 100 American speeches of the 20th century by 137 leading ...
Primordial black hole. Formation of the universe without (above) and with (below) primordial black holes. In cosmology, primordial black holes ( PBHs) are hypothetical black holes that formed soon after the Big Bang. In the inflationary era and early radiation-dominated universe, extremely dense pockets of subatomic matter may have been tightly ...
The territory of Central Black Earth Biosphere Reserve was divided between the core area, the buffer zone, and the transition zone. V.V. Alekhin nature reserve was the core of new biosphere reserve, its territory was divided into five fragments, three of which were near such big cities as Kursk and Stariy Oskol.