-
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.
-
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.
-
-
-
-
-
-
-