Some day, with all that the Cities could do, the available calories per person would simply fall below basic subsistence level. - Isaac Asimov

is fifty years now since this Foundation was established – sfifty years in which the members of the Foundation have been ignorant of what it was they were working toward. It was necessary that they be ignorant, but now the necessity is gone. 'The Encyclopedia Foundation, to begin with, is a fraud, and always has been!

He clearly knew how dangerous it was to have an excited twelve-year-old handling a powerful weapon.

...podemos afirmar que hacia 350 a.C. ningún científico dudaba ya de que la Tierra fuese una esfera. Desde entonces, este concepto ha sido admitido en todo momento por cualquier hombre culto del mundo occidental.