Word: milutin
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Dates: during 1990-1999
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...that much of the Northern Hemisphere had once been covered by thick sheets of ice was both new and highly controversial. Within a few decades, though, most scientists were convinced and began looking for explanations. Several suggested that astronomical cycles were involved, and by the 1930s the Yugoslav astronomer Milutin Milankovitch had constructed a coherent theory. The ice ages, he argued, were triggered by changes in the shape of the earth's slightly oval orbit around the sun and in the planet's axis of rotation. Studies of the chemical composition of ocean-floor sediments, which depend on climate conditions...
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