My thought

   The novel unfolds in the form of science fiction.The protagonist rides a homemade time machine to the world 8000,000 years later. By then humans had split into two species , and the earth was getting hotter and hotter. Everything has been changed. However , something is interesting and exciting. Time traveler saw the Upper-world man drifted towards his feeble prettiness and the Under -world man to mere mechanical industry there. What kind of future world do you imagine?