They both speculate on the possible effects that these advanced programs can have on man.
One of the differences between the short stories is that ‘A sound of Thunder’ is a pure science fiction where things only happen in future setting 2255 AD and in Jurassic period whereas in ‘Nethergrave’ things happen in real world that translates into a fictional world .
In ‘A sound of thunder’ very small actions translates into tremendous effects in time as the author refers them to “infinitesimally”, for example a Jurassic butter fly accidentally killed by Eckels leads to extreme changes in the future like the change in the US president and even language spelling. In ‘Nethergrave’ Jeremy’s detailed day’s activities like being forced to play football, coming late for the chat and his friends signing out earlier does not influence him joining Nethergrave .Events event