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The presidency of William Henry Harrison, who died 31 days after taking office in 1841, was the shortest in American history. [6] Franklin D. Roosevelt served the longest, over twelve years, before dying early in his fourth term in 1945.
The history of the lands that became the United States began with the arrival of the first people in the Americas around 15,000 BC. Numerous indigenous cultures formed. After European colonization of North America began in the late 15th century, wars and epidemics decimated indigenous societies. Starting in 1585, the British Empire colonized ...
Stages 4 and 5 (0.85 Ga – present): Other O 2 reservoirs filled; gas accumulates in atmosphere. [ 1 ] The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, [ 2 ] was a time interval during the Earth 's Paleoproterozoic era when the Earth's ...
August. August 6 – WW II: Atomic bombing of Hiroshima – United States Boeing B-29 Superfortress Enola Gay drops a uranium-235 atomic bomb, codenamed " Little Boy ", on the Japanese city of Hiroshima at 8:15 a.m. local time, resulting in between 90,000 and 146,000 deaths.
The history of the United States from 1945 to 1964 was a time of high economic growth and general prosperity. It was also a time of confrontation as the capitalist United States and its allies politically opposed the Soviet Union and other communist states; the Cold War had begun. African Americans united and organized, and a triumph of the ...
It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name Eocene comes from the Ancient Greek Ἠώς (Ēṓs, " Dawn ") and καινός (kainós, "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. [ 7 ][ 8 ] The Eocene spans the time from the end of the Paleocene Epoch to the ...
Wikimedia Commons has media related to 1945. 1945 (MCMXLV) was a common year starting on Monday of the Gregorian calendar, the 1945th year of the Common Era (CE) and Anno Domini (AD) designations, the 945th year of the 2nd millennium, the 45th year of the 20th century, and the 6th year of the 1940s decade.
World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all the world's countries—including all the great powers—participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war, blurring the distinction between military and ...