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61 Topic Pages Found in History and starting with the letter R
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Open radiocarbon dating
radiocarbon dating

Method of dating organic materials (for example, bone or wood), used in archaeology. Plants take up carbon dioxide gas from the atmosphere and

Open Ra (Egyptian deity)
Ra (Egyptian deity)

In Maatian or ancient Egyptian theology, Ra (Re) is the Creator and has many names, manifestations, and forms according to the sacred texts, beginning

Open Ragnarok (Norse mythology)
Ragnarok (Norse mythology)

Demise of the gods and of the cosmos at the end of the mythological present. Although most Viking Age poets and modern scholars use the form above,

Open Ramadan
Ramadan

According to numerous accounts of the Prophet Muhammad, fasting was a regular part of his practice and he admonished his followers to follow his

rammed earth

material consisting chiefly of soil of sufficiently stiff consistency that has been placed in forms and pounded down. It has been used for buildings

Open Ransome, Arthur (1884 - 1967)
Ransome, Arthur (1884 - 1967)

English writer of adventure stories for children. A journalist, he was correspondent in Russia for the Daily News during World War I and the Russian

Open Ransom, John Crowe (1888-1974)
Ransom, John Crowe (1888-1974)

1888–1974, American poet and critic, b. Pulaski, Tenn., grad. Vanderbilt Univ. and studied at Oxford as a Rhodes scholar. He is considered one of the

Open Reconstruction (1865-1877)
Reconstruction (1865-1877)

Generally dating from 1865 to 1877, Reconstruction is the term describing the period of readjustment following the American Civil War. The term is

Open Red Army
Red Army

The army of the USSR until 1946; it later became known as the Soviet Army. Founded by the revolutionary Leon Trotsky , it developed from the Red

Open Red Cross
Red Cross

international organization concerned with the alleviation of human suffering and the promotion of public health; the world-recognized symbols of mercy