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.
The theory that he was exposed to at the University of Padua was a new theory that was proposed by Nicolaus Copernicus which stated that the Earth and all the other planets revolved around the sun. Also Gaileo's observations with his new telescope made him believe Copernicus's heliocentric theory.