Lost Knowledge (Technology and Change in History): The Concept of Vanished Technologies and Other Human Histories

By Benjamin B. Olshin ’85. Throughout human history, the idea of the existence of civilizations and technologies far beyond our own has always existed. What are the foundations of lost knowledge? Did mechanical flight and the transmission of images exist long before the technology as we understand it? Why did so many cultures have a golden age? Olshin investigates texts from China, South Asia and other regions to find answers, and he presents ideas backed by evidence and analysis.