Practice Typing

The last salient point in which the systems of these creatures differed from ours was in what one might have thought a very trivial particular. Micro organisms, which cause so much disease and pain on earth, have either never appeared upon Mars or Martian sanitary science eliminated them ages ago. A hundred diseases, all the fevers and contagions of human life, consumption, cancers, tumours and such morbidities, never enter the scheme of their life.