Round the Wonderful World

When you have noticed a fly crawling on a ball or an orange has it ever occurred to you how a man would look crawling about on the earth if seen from a great height? Our world is, as everyone knows, like an orange in shape, only it is very much larger in comparison with us than an orange is in regard to a fly. In fact, to make a reasonable comparison, we should have to picture the fly crawling about on a ball or globe fifty miles in height; to get all round it he would have to make a journey of something like one hundred and fifty miles. It would take a determined fly to accomplish that! Yet we little human beings often start off on a journey round the world quite cheerfully, and it is more difficult for us than for the imaginary fly, because the globe is not a smooth surface of dry land, but is made up of jungles and deserts and forests and oceans. There are some places where people can do nothing in the heat of the day, and others where their flesh freezes like cold white marble in a moment if they don't take precautions