Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process.
The first man to discover that the earth moves around the sun was an Italian scientist named Galileo Galilei.
Which scientist discovered that it was the pull of the suns gravitational attraction that kept the planets in their orbits? It was Nicholas Copernicus. who discovered that the sun keeps the planets one Their orbit.