I think that space flight is a condition of Nature that comes into effect when an intelligent species reaches the saturation point of its planetary habitat combined with a certain level of technological ability... I think it is a built-in… — Donald A. Wollheim Copy Share Image
The years of space flight since the orbiting of Sputnik I back in 1957 had produced many fascinating results, but they had also brought a realization of the many problems that surrounded the use of rockets for space flight. — Donald A. Wollheim Copy Share Image
I think that the first men to land on Pluto are going to make some very astonishing discoveries. But I am also sure that… — Donald A. Wollheim Copy Share Image
I think that space flight is a condition of Nature that comes into effect when an intelligent species reaches the saturation point of its… — Donald A. Wollheim Copy Share Image
Once solved, the severe handicaps imposed on space exploration by the weight and chemical limitations of rockets would no longer apply. The whole timetable… — Donald A. Wollheim Copy Share Image
Human nature is violent, argumentative, fallible, and given to endless fantasizing. — Donald A. Wollheim Copy Share Image
The years of space flight since the orbiting of Sputnik I back in 1957 had produced many fascinating results, but they had also brought… — Donald A. Wollheim Copy Share Image
While the circumnavigation of the solar system seems farfetched, it may not be once the problem of effective anti-gravitational control is solved. — Donald A. Wollheim Copy Share Image
