Copper (symbol Cu , atomic number 29) is one of the oldest known metals in human history. Reddish orange in color, it is ductile, malleable, and an excellent conductor of heat and electricity. In its ionic form, copper is an essential element for higher plants and animals, as well as for the human body.
Cretaceous period 145 - 65 million years ago PreЄ Є O S D C P T J K Pg N Key events in the Cretaceous period -140 - - -130 - - -120 - - -110 - - -100 - - -90 - - -80 - - -70 - - Maastrichtian Campanian Santonian Coniacian Turonian Cenomanian Albian Aptian Barremian Hauterivian Valanginian Berriasian Jurassic Paleogene C r e t a c e o u s p e r i o d Mesozoic era Cenozoic era An approximate timescale of key Cretaceous events.
Oda Nobunaga (織田 信長; original name Kichihoshi, later Saburo) (June 23, 1534 - June 21, 1582) was a major daimyo during the Sengoku period of Japanese history, and one of the three great founders of the united Tokugawa shogunate. Born the son of an insignificant daimyo in Owari province, near present-day Nagoya, Oda quickly brought the domain under his control.
Sir Halford John Mackinder (February 15, 1861 - March 6, 1947), was an English geographer and politician. He was knighted for his work in 1920. Mackinder was instrumental in establishing geography as a unified and recognized academic discipline. He is famous for his geopolitical conception of the globe as divided into two parts-the superior Eurasian “heartland” and the inferior rest of the world.
Criterion II The historic town of Saint-Louis exhibits an important exchange of values and influences on the development of education and culture, architecture, craftsmanship, and services in a large part of West Africa. Criterion iv The Island of Saint-Louis, a former capital of West Africa, is an outstanding example of a colonial city, characterized by its particular natural setting, and it illustrates the development of colonial government in this region.
A season is one of the major divisions of the year, generally based on yearly periodic changes in weather. In temperate and polar regions, four seasons are generally recognized: spring, summer, autumn or (fall), and winter. In some tropical and subtropical regions, where the amount of precipitation varies more dramatically than the average temperature, it is more common to refer to a rainy (or wet, or monsoon) season and a dry season.