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ozone layer

(Encyclopedia)ozone layer or ozonosphere, region of the stratosphere containing relatively high concentrations of ozone, located at altitudes of 12–30 mi (19–48 km) above the earth's surface. Ozone in the ozone...

heredity

(Encyclopedia)heredity, transmission from generation to generation through the process of reproduction in plants and animals of factors which cause the offspring to resemble their parents. That like begets like has...

Bergman, Ingmar

(Encyclopedia)Bergman, Ingmar (Ernst Ingmar Bergman) ĕrnst ĭngˈmär bĕrˈyəmän [key], 1918–2007, Swedish film and stage writer, director, and producer. Acclaimed by many as the greatest director of the seco...

Russian Revolution

(Encyclopedia)Russian Revolution, violent upheaval in Russia in 1917 that overthrew the czarist government. The civil war between the Bolsheviks (Reds) and the anti-Bolsheviks (Whites) ravaged Russia until 1920. ...

Nkrumah, Kwame

(Encyclopedia)Nkrumah, Kwame kwäˈmā nkro͞oˈmä [key], 1909–72, African political leader, prime minister ...

Lumumba, Patrice Emergy

(Encyclopedia)Lumumba, Patrice Emergy pətrēsˈ ĕmârzhēˈ lo͞omo͞omˈbä [key], 1925–61, pr...

Meiji restoration

(Encyclopedia)Meiji restoration, The term refers to both the events of 1868 that led to the “restoration” of power to the emperor and the entire period of revolutionary changes that coincided with the Meiji emp...

Erdoğan, Recep Tayyip

(Encyclopedia)Erdoğan, Recep Tayyip rĕjĕpˈ tīyĭpˈ ûrˈdōän [key], 1954–, Turkish politician. He was educated at Marmara Univ., where he met Necmettin Erbakan, who went on to head the Islamist Welfare pa...

Tuareg

(Encyclopedia)Tuareg or Touareg both: twäˈrĕg [key], Berbers of the Sahara, numbering c.2 million. They have preserved their ancient alphabet, which is related to that used by ancient Libyans. The Tuaregs tradit...

Qaddafi, Muammar al-

(Encyclopedia)Qaddafi, Muammar al- mo͞oäm-märˈ äl-käd-däˈfē [key], 1942–2011, Libyan army officer and dictator. He graduated from the Univ. of Libya in 1963 and became an army officer in 1965. In 1969 he...