When viewed in retrospect by our future historians, this last year or two may well be found to be comparable in their implications to those of the late 1480's. During that era, accumulations of bits and pieces of knowledge, the development of technologies and the adventurous trend of the time resulted in a comparatively great monetary gamble by Ferdinand and Isabella and a great personal gamble by Columbus, his colleagues and crewmen. They launched themselves into a vast void with an accepted risk probably greater than the calculated risk which will be accepted by the first man to be launched
AVIATION MEDICINE ON THE THRESHOLD OF SPACE: GENERAL CONSIDERATIONS. Ann Intern Med. 1959;50:1542–1549. doi: 10.7326/0003-4819-50-6-1542
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Published: Ann Intern Med. 1959;50(6):1542-1549.
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