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en.wikipedia.org/wiki/20th_century

The 20th century was a century that began on January 1, 1901 and ended on December 31, ... It took all of human history up to 1804 for the world's population to reach 1 billion; world population reached an estimated 2 billion in 1927; by late  ...

www.thoughtco.com/20th-century-timelines-1779957

Jul 31, 2017 ... The 20th-century was a century of major changes in the way people live, ... The Center for American History, The University of Texas at Austin.

www.khanacademy.org/humanities/world-history/euro-hist

You cannot properly understand current world events without understanding the history of the 20th Century. This topic takes us on a journey from the end of ...

www.oxfordreference.com/view/10.1093/acref/9780191735639.timeline.0001

Years: 1900 - 1999, Subject: History, modern history (1700 to 1945). Publisher: HistoryWorld, Online Publication Date: 2012. Current online version: 2012 ...

www.historyonthenet.com/twentieth-century

20TH CENTURY ... On this site you can find links to our pages and categories featuring everything you'd like to know about Twentieth Century History. We also  ...

www.ask.com/youtube?q=20th+Century+History&v=p-etgd6fb8Q
Oct 17, 2007 ... This video is blocked in some countries an identical alternative video: http://www. youtube.com/watch?v=YTya0p_550I] The history of the 20th ...

www.britannica.com/technology/history-of-technology/The-20th-century

history of technology - The 20th century: Recent history is notoriously difficult to write, because of the mass of material and the problem of distinguishing the ...

hsp.org/collections/catalogs-research-tools/subject-guides/20th-century-collections

The depth and breadth of the Historical Society of Pennsylvania's 20th-century collections is significant. These rich collections, dating up through the late 20th ...

www.bbc.co.uk/bitesize/ks3/history/20th_century

The 20th century. The last century saw some of the biggest conflicts in history. Explore the terrifying tragedies and the incredible bravery that have shaped ...