What do you do with adventure novels from a great writer, with some science fiction incorporated, but are mostly filled with science facts, about nature and geography? In this instance you skip a simple servant and add a black giant. You try to incorporate as much of the adventure which can be found in the novel. For some female addition, you add a lost girl and a daughter for the captain. You change a lead-captain from a harsh man into a cruel man. Does this make for a entertaining movie? Yes. Is it necessary? NO . Jules Verne's novels are good enough as they are.