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.
Galileo is famous for discovering the Galilean moons (Jupiter's four largest moons--Io, Ganymede, Europa, and Callisto) Galileo is most famous for his scientific hypothesis that the Earth revolves around the sun, rather than the sun revolving around Earth, as most people believed in that day. He went to trial for his hypothesis because of its apparent contradictory nature to the Scripture, or Bible.