The World Beyond

A Million years hence, life on Earth has undergone a radical transformation that has brough it under threat from extraterresteral trials. To settle its difficulties, a time-traveler from the twentieth century must attempt a further odyssey into the remote future time, which only he is qualified to undertake. But will he be able to bring back any intelligence from his voyage, if he manages to return at all-or will the possiblity that he might change history doom his quest from the outset?