Science & technology

Louis Agassiz proposes the Ice Age theory

1837

In July 1837 the Swiss-born naturalist Louis Agassiz, speaking at the Swiss Society of Natural Sciences in Neuchatel, argued that a great ice age had once covered Europe in glaciers. Earlier observers, including the Swiss peasant-naturalist Jean-Pierre Perraudin and the engineer Ignace Venetz, had noticed that huge boulders in the Alps had been carried far from their sources by ice. Agassiz then expanded the idea to Britain and North America, and moved to Harvard in 1847. The theory transformed geology and explained erratic boulders, scratched bedrock and U-shaped valleys.

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This moment belongs to the Industrial era (1760 CE to 1914 CE), steam, factories and revolutions. You can also browse everything in the 19th century.