World's End and the Sea Angle

Graduate students David, a white man, and Emily, a student from China fall in love with each other on campus of University of Colorado at Boulder. They are fascinated by sprawling topics likes the universe, the world, and human beings.
When David is caught by a tornado on the Kansas plains he is carried to a time-space tunnel which he traverses along. Stranded in East Africa during the Stone Age, David experiences primitive life and strange romantic adventures.

Emily watches with the advice...