The Britannica Guide to Theories and Ideas That Changed the Modern World by Heather M Campbell, Kathleen Kuiper
Requirements: .PDF reader, 4.4 mb
Overview: There was a time when people assumed that the world was flat. Once an alternate theory was proposed, the original notion was challenged and, eventually, disproved. In short, theories and ideas can be potent agents of changenone more so than those that are extensively detailed in this book. Fascinating photographs and illustrations accompany the narrative.
Genre: Non-Fiction > History
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