The cave of time
You can see no future for yourself with these primitive people, so you run back toward the Cave of Time. Fortunately, they do not follow you, and you are able to find your way.
By the time you re-enter the cave, you are hungry and exhausted. The light is dimmer than be- fore and you grope your way along, looking for a passageway. You stumble and fall headfirst down an embankment, bumping your head disagreeably. You look up and see daylight ahead. A minute later, you walk out of the cave into warm, moist air near a forest of leafy trees. A bird flies by. You don’t know when it is, but it looks pleasant enough.