Summary This is an informative and non-fiction essay by Darrel Bernard and Lon Edwards. The writers have explained the ways our lives have been changed by the use of scientific method. The writers tell that we have greatly benefitted from the use of scientific method. We have had a better control of diseases. Science has discovered the cause of diseases. We are now given vaccines against the diseases. The new diagnostic methods have helped us treat many diseases. as a result, our life chances have increased. Our sanitary conditions have become good. Only a hundred years ago, our cities faced numerous sanitary problems which have been addressed by using the scientific method. Today our cities are paved, well-drained, and they are cleaned regularly. A century ago it was common practice in many cities by the bucketful for household use. Water had to be carried considerable distance from the well to the home. It was, therefore, used very sparingly ...