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51ancient Rome — ▪ ancient state, Europe, Africa, and Asia Introduction the state centred on the city of Rome. This article discusses the period from the founding of the city and the regal period, which began in 753 BC, through the events leading to the… …
52Reconstruction Era of the United States — In the history of the United States, the term Reconstruction Era has two senses: the first covers the entire nation in the period 1865–1877 following the Civil War; the second one, used in this article, covers the transformation of the Southern… …
53M'Naghten Rules — The M Naghten Rules (pronounced, and sometimes spelled, McNaughton) were a reaction to the acquittal of Daniel McNaughton. They arise from the attempted assassination of the British Prime Minister, Robert Peel, in 1843 by Daniel M Naghten. In… …
54Computers and Information Systems — ▪ 2009 Introduction Smartphone: The New Computer. The market for the smartphone in reality a handheld computer for Web browsing, e mail, music, and video that was integrated with a cellular telephone continued to grow in 2008. According to… …
55HIV — Classification and external resources Diagram of HIV …
56Carbon tax — Part of a series on Green economics Concepts …
57Taxation in the United States — is a complex system which may involve payment to at least four different levels of government and many methods of taxation. United States taxation includes local government, possibly including one or more of municipal, township, district and… …
58Clinical trial — Clinical trials are a set of procedures in medical research and drug development that are conducted to allow safety (or more specifically, information about adverse drug reactions and adverse effects of other treatments) and efficacy data to be… …
59MMR vaccine controversy — The MMR vaccine controversy is over the safety of the MMR vaccine. Critics of the vaccine say that the incidence of autism has greatly increased and that the vaccine is a primary cause of this increase. They posit that the vaccine can overwhelm… …
60Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
