The two friends prevail against the Neanderthals , and Mark says his goodbyes .
A battle ensues , and Mark and Tlaxcan pursue some Neanderthals across the plains in the direction of the space - time machine .
The two friends prevail against the Neanderthals , and Mark says Mark 's goodbyes .
A battle ensues , and Mark and Tlaxcan pursue some Neanderthals across the plains in the direction of the space - time machine .