Free Download of : Carl Sagan – Cosmos (Random House, New Edition, 1980, 2002)
The time will come when diligent research over long periods will bring to light things which now lie hidden. A single lifetime, even though
entirely devoted to the sky, would not be enough for the investigation of so vast a subject . . . And so this knowledge will be unfolded only
through long successive ages. There will come a time when our descendants will be amazed that we did not know things that are so plain to them . . . Many discoveries are reserved fo ages still to come, when memoryof us will havebeeneffaced.Ouruniverse is a sorry little affair unless it has in it something for every age to investigate . . .