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We live on the edge of a ball in space, orbiting a star. How do we find out what we are made of and where we came from?
Plate tectonics is the key to understanding our oceans and our continents.
Volcanoes are among the most dramatic features of the Earth, and a sure sign that the planet is alive.
Although plate tectonics is very good at describing what happens to the sea floor, it is little help in describing what happens when the continents themselves deform.
Water is an essential ingredient of the Earth, and without it we would not be here.
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