President's page
Identifieur interne : 000307 ( Istex/Curation ); précédent : 000306; suivant : 000308President's page
Auteurs :Source :
- Eos, Transactions American Geophysical Union [ 0002-8606 ] ; 1960-06.
Abstract
When we reflect on the origin and history of geophysics, it is thought‐provoking to single out three epochs of especial significance, separated from each other by about one millenium. The record shows that over two thousand years have passed since the beginning of serious geophysical thought. Indeed it was a few centuries before the start of the Christian era that Pythagoras came to the conclusion that the Earth has a spherical form; and about this time the early philosophers were able to make an estimate of the circumference of our globe, not merely to a crude approximation, but with truly remarkable accuracy in consideration of the state of science and the measuring tools available in those days. This was a noteworthy achievement in that it profoundly altered man's thinking in relation to the Earth and even the Universe. As we follow swiftly the development of science throughout the succeeding centuries, we may pause to note that something like ten centuries after our first epoch, a second notable advance in culture, in this instance within the Arabic countries, led to an extraordinary broadening of knowledge in many realms of science, including those bearing on an understanding of our Earth and its surroundings. This, strangely enough, happened during the very period in world history that over‐laps what for Europe has been called the Dark Ages.
Url:
DOI: 10.1029/TR041i002p00129
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