Omega by Camille Flammarion — Read

The events which we have just described, and the discussions to which they gave rise, took place in the twenty-fifth century of the Christian era. Humanity was not destroyed by the shock of the comet, although this was the most memorable event in its entire history, and one never forgotten, notwithstanding the many transformations which the race has since undergone. The Earth had continued to rotate and the Sun to shine; little children had become old men, and their places had been filled by others in the eternal succession of generations. Centuries and ages had succeeded each other, and humanity, slowly advancing in knowledge and happiness, through a thousand transitory interruptions, had reached its apogee and accomplished its destiny.

But how vast these series of transformations -- physical and mental!