Plate tectonics is a relatively new scientific concept, introduced some 30 years ago, but it has revolutionized our understanding of the dynamic planet upon which we live. ... However, by the mid-19th century, catastrophism gave way to "uniformitarianism," a new way of thinking centered on the "Uniformitarian Principle" proposed in 1785 by James Hutton, a Scottish geologist. ... The theory of continental drift would become the spark that ignited a new way of viewing the Earth. ... However, after his death, new evidence from ocean floor exploration and other studies rekindled interest in Wegene...