Much has been said about the movie and all I want to add is what I think are the two best scenes in the movie. The first is when the clay covered tribe member took Naoh into the cave and showed him how to make fire by friction. The look on Naoh's face could not express more wonder if he had pulled a buffalo out of his ear. The second scene was after they returned to their own tribe and tried to narrate to the rest of their tribe the things that they had seen along the way, seemingly inventing language as they went.
Review of Quest for Fire
