Jack Gilford

The reinvigorated elderly group that left Earth comes back to visit their relatives. Will they all decide to go back to the planet where no one grows old, or will they be tempted to remain on Earth?

When a group of trespassing seniors swim in a pool containing alien cocoons, they find themselves energized with youthful vigor.

Disgraced and cast out of his tribe for lusting after Lana, the mate of the tribe's head muscle man, Atouk stumbles along gathering other misfits and learning a bit about the world outside of his cave. Eventually he and friends Lar and Tala learn the secrets of fire, cooked meat, and how to defend themselves from the brutal, yet very stupid dinosaurs.