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.
Kepler's Laws of Planetary Motion. In the sixteenth century, most people believed in the ideas of the ancient astronomer Ptolemy, that the planets, Moon, and Sun all orbited around the Earth. Then in 1543, Nicolaus Copernicus proposed the idea that the planets and the Earth orbited around the Sun.