Methuselah's Children Author:Robert A. Heinlein EARTH's OUTCASTS — Members of the Families were ordinary human beings except for one disturbing trait: they were extraordinarily long-lived. And in the ultra-civilized year of A.D. 2125 this distinction was intolerable. Hounded for a secret they did not knowingly possess, the Families were forced to choose - torture and extinction by their jealou... more »s, short-lived fellow humans...or flight from Earth on an untested starship.
They chose flight. But to their horror they discovered that the alien stars nourished a threat even more terrifying than the one which had taken them from Earth...« less