Thiotimoline to the stars(搬运)(12)
"In short, an endochronic ship will slowly go isochronic and become ordinary matter without temporal extension. Modem technology has reduced the rate of unpuckering enormously and may reduce it further still, but nothing we do, theory tells us, will ever create a truly stable endochronic molecule.
"This means that your starship has only a limited life as a starship. It must get back to Earth while its endochronicity still holds, and that endochronicity must be restored before the next trip.