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Which book did Louis Agassiz publish in 1840 about glaciers?
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Louis Agassiz
An undated engraving of Louis Agassiz.
In 1840, the Swiss-born naturalist Louis Agassiz published his influential work titled Études sur les glaciers ("Studies of Glaciers"). In this book, he demonstrated that Alpine glaciers had been significantly more extensive in the past, providing foundational evidence for his theory of an ice age.1