02:24
Making the Pieces Fit: Confirming the Theory of Plate Tectonics
The theory of plate tectonics was initially accepted largely on the basis of indirect, paleomagnetic data. Eventually, however, it was confirmed through the use of GPS technology, which is able to actually measure plate motion.
02:49
World in Motion: Earth's Tectonic Past and Future
Scientists attempt to reconstruct Earth's history so as to better understand the current state of geologic affairs, including those forces that cause plate movement.