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In general discussion, a nation-state is variously called a "country," a "nation," or a "state."

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The United States of America—also referred to as the United States, the USA, the U.S., America, the States, or (archaically) Columbia—is a federal republic of 50 states and the District of Columbia located primarily in central North America.

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The human body is the physical manifestation of a human being, including the chemical elements, cells, and extracellular materials and the organization of these materials into tissues, organs, and systems.

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Birds (class Aves) are bipedal, warm-blooded, oviparous (egg-laying) vertebrates characterized primarily by feathers, forelimbs modified as wings, and a bony beak without teeth.

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The watershed event of United States history was the American Civil War (1861–1865), fought in North America between 24 mostly northern states of the Union and the Confederate States of America, a coalition of eleven southern states.

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Ancient Egypt as a general historical term broadly refers to the civilization of the Lower Nile Valley (or the Great Rift Valley) between the First Cataract and the mouths of the Nile Delta, from circa 3300 B.C.E. until the conquest of Alexander the Great in 332 B.C.E..

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Aztec calendar stone

The Aztecs were a Mesoamerican people of central Mexico in the fourteenth, fifteenth, and sixteenth centuries.

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The Inca Civilization (called Tawantinsuyu in modern spelling, and Quechua, or Tahuantinsuyu in old spelling), was an empire located in South America from 1438 c.e. to 1533 c.e.

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Civilization refers to a complex human society, in which people live in groups of settled dwellings comprising cities.

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Trees are the largest plants. They are not a single taxon (unit of biological classification) but include members of many plant taxa.

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World War II, also WWII, or the Second World War, was a global military conflict that took place between 1939 and 1945.

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Altamira (Spanish for “high view”) is a cave in Spain famous for its Upper Paleolithic cave paintings featuring drawings and polychrome rock paintings of wild mammals and human hands.

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Cleopatra VII Philopator (January, 69 b.c.e. – August 12, 30 b.c.e.) was queen of Ancient Egypt, the last member of the Macedonian Ptolemaic dynasty and hence the last Greek ruler of Egypt.

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Constantinople (Greek: Κωνσταντινούπολη) was the capital of the Byzantine Empire and, following its fall in 1453, of the Ottoman Empire until 1930, when it was renamed Istanbul as part of Mustafa Kemal Atatürk's Turkish national reforms.

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Madeline McDowell Breckinridge (May 20, 1872 – November 25, 1920) was an American reformer and social activist, leader of the women's suffrage movement and one of Kentucky's leading Progressive reformers.

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Ahab seeks to buy Naboth's vineyard

Ahab or Ach'av (אַחְאָב, "Brother of the father") was an important king of Israel.The son and successor of King Omri, his reign is dated variously, with estimates ranging from 869-850 B.C.E. to 874-853 B.C.E.

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Television (or TV) (from the Greek tele, meaning "far," and the Latin visio, meaning "sight") is a telecommunication system for broadcasting and receiving moving pictures and sound over long distances.

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The Amazon River of South America is the world's largest river and the lifeblood of the world's largest ecosystem, spanning two-fifths of an entire continent.

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Socrates (ca. 469 – 399 b.c.e.) (Greek Σωκράτης Sōkrátēs; but in English always: Sǒkratēs) was a Greek philosopher.

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Go or Igo in Japanese (囲碁), Weiqi in Chinese (圍棋, 围棋), and Baduk in Korean (바둑), is a strategic board game.

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