In the 1970's some Hippies looking for the Fountain of Eternal Youth enter a remote cave and go missing. In the present day, a professor, who is actually their son, goes looking for them, enters a cave and goes missing. Some of his students and their siblings and friends go looking for him, and they get trapped in the cave as well.
Inside the cave, time goes by very slowly compared to outside. In less than a second, several years pass by outside. This makes for the the introduction of stereotypical grunting cavemen, and super-soldiers from the future who are unable to breath our air The students quickly realise that they can never go "home" again, as the Earth has died, and everyone has gone to Mars.
I liked this film, but my criticism would be that it has too many ideas. The fountain of youth/healing does exist, with the problem of never being able to benefit by leaving the cave. Deeper inside the cave is another place where time passes even more slowly again, and there is a perpetual battle between natives and conquistadors. Then further in the future, the Earth becomes a water world, and then they all get rescued by the people from Mars, including the now revived parents of the professor.
Inside the cave, time goes by very slowly compared to outside. In less than a second, several years pass by outside. This makes for the the introduction of stereotypical grunting cavemen, and super-soldiers from the future who are unable to breath our air The students quickly realise that they can never go "home" again, as the Earth has died, and everyone has gone to Mars.
I liked this film, but my criticism would be that it has too many ideas. The fountain of youth/healing does exist, with the problem of never being able to benefit by leaving the cave. Deeper inside the cave is another place where time passes even more slowly again, and there is a perpetual battle between natives and conquistadors. Then further in the future, the Earth becomes a water world, and then they all get rescued by the people from Mars, including the now revived parents of the professor.