Geophysics

It has been said that science may be divided into two categories, astronomy which covers all things outside the Earth, and geophysics which deals with everything else. The geophysicist is dedicated to the study of the earth by physical means, and the Earth as a whole is his sphere. This is perhaps the biggest difference between the geophysicist and the geologist, for present geological techniques are based only on the study of the features of the Earth which are disclosed at the very surfac...