oa Journal of the Astronomical Society of South Africa - An astronomical aspect of the evolutionof the earth

Volume 4, Issue 1
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Among the problems of the evolution of celestial bodies which confront the physicist the evolution of our own planet is the one which perhaps appeals most strongly to the human interest on account of its important bearing on investigations into the origin of life. Whatever our views on this question may be, we agree that the existence and development of organic life is conditioned by physical factors, such as temperature, pressure, humidity and chemical composition of the atmosphere and many others which, within comparatively narrow limits, must combine in a manner favourable to the growth of living organisms. A study of biological evolution must therefore always be closely associated with a study of physical evolution.

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