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Scientist notes importance of rock layers
Danish-born scientist Nicolaus Steno recgonizes that sediments form new layers of rock on top of old layers. Therefore, digging down proves a way to move back in time. Scientists plan to build on Steno's dsicovery to determine the ages of fossils found in rock layers. -
New theory suggest naturalness of change
James Hutton of Scotland revolutionizes geology with his theory of uniformitarianism. He argues that volcanoes, erosion, and other forces shaped Earth's landscape slowly over a very long period and continue to do so. Hutton's ideas challenge the belief that the landscape is the result of sudden changes and one-time events. His theory leads to a better understanding of the vast ages of Earth and fossils. -
Siberian dsicovers frozen mammoth
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Geologist identifies bones from extinct animal
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Workers uncover bird fossil
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Dinosaur eggs show link with birds
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Microfossils cause sensation
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Dinosaur heart surprises many
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Researchers find earliest mammal