Under Vorst humankind had dared and achieved much: the reshaping of an entire planet, the genetic alteration of the race to fit another, even the promise of immortality. But it was not enough; even Eternity is too small for mankind imprisoned in one star-system, and Vorst would risk it all for the chance to “punch a hole in the sky!”Breathtaking in scope, TO OPEN THE SKY is Robert Silverberg’s vast epic of the human race at the threshold of discovery—of a future time as heavy with destiny as that long-ago year when campfires were first seen in the gorges of Africa…[A fix-up novel/collection of 5 short stories]