The Earth on Which We Walk

In the normal pursuit of our daily activities we seldom, if ever, give thought to this terrestrial ball of matter to which we are bound so completely. This world upon which we rush to and fro seems in comparison to our bodies very huge indeed! But we and it are composed of the same basic elements, so that we are indeed of the earth earthy. Our great interest lies, of course, in the activities that take place on its great curving surface and although we are restricted to a tiny part of it, yet...