... Mars . ... Scientist discovers plate tectonics on Mars . ... For years, many scientists had thought that plate tectonics existed nowhere in our solar system but on Earth. ... It gives us a glimpse of how the early Earth may have looked and may help us understand how plate tectonics began on Earth," said researcher An Yin. ... I don't quite understand why the plates are moving with such a large magnitude or what the rate of movement is т?? maybe Mars has a different form of plate tectonics," Yin said...