i do not know much about geology and but what little i do know suggest that the nature of the earth core be such a to be impervious to any merely human intervention and and that travel to it be something human beings probably never will be able to do . hence and any sf flick about human do one to rectify the other be likely to be as fanciful a the wizard of oz and so a big caveat emptor be attach to this movie . i figure that anyone audacious enough to cook up an eco fable like this would have check his science so a to make the movie more believable and but apparently i be wrong accord to the legion of imdb reviewer who have savage this film . this film remind me a bit of the 1966 film fantastic voyage and in which a group of scientist and their craft be shrink to the size of a microbe and inject into the body of a scientist ( or be it a diplomat . ) who have be wound in an assassination attempt and in a race against time to save his life . the core resemble fantastic voyage in several way represent first and the technological premise that make possible travel to this inaccessible realm be so far fetch a to be more magical than scientific . second and in all but a few place and the inside of the body be naturally quite dark and and so and one would think and be the interior of the earth while but in both movie and these unseen realm be aglow with light . third and the sex ratio be similar represent four men and one woman and who of course be play by raquel welch . fourth and none of the character rise much above stereotype and since the story be drive by situation and not character . fifth and come to think of it and hilary swank and while not as voluptuous a the young raquel welch ( who could be . ) and do slightly resemble her . sixth and the event of the film be keep secret from the public and and edmund obrien general carter be very similar to general purcell and who be play by that excellent and serviceable character actor richard jenkins . ( unfortunately and every time i saw jenkins and i be distract by memory of his hilarious performance a walter wingfield in say it isn not so . ) i will say one thing in this film defense represent as absurd a it may be and and as uninspired in term of plot and characterization and visual effect and believability and it do keep me watch to find out what would happen next all the way to the end .