Science and its Times (Vol.6) 1900 to 1949
	Категория: Энциклопедии и словари, Энциклопедии издательства «Gale Inc.»
		Автор: Neil Schlager Издательство: Gale Год издания: 2001 isbn: 0-7876-3938-9 Количество страниц: 652 Язык: english Формат: PDF Размер: 8 Мб Каталожный номер: 4354	The years between 1900 and 1949 were a time of extremes that included two world wars, a revolution in Russia, and the Depression in the United States. Scientific revolutions brought exciting new knowledge but also called into question the most basic concepts. New technologies and materials provided more deadly instruments of war but also lengthened lives and eased the demands on raw human muscle power. Exploration in this period echoed these extremes. Since many of the easier targets had already been reached, explorers headed for the poles, ventured deep beneath the ocean’s surface, and high into the atmosphere.
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	0 Опубликовал: flashsoft | 1-06-2006, 00:00 | Просмотров: 852   Комментарии (4)  Печать