Fan Casting City of the Young

In year 2065, a team of five biologists decide to make history. They go out to mark an unexplored area of different biomes, 6 times as big as Manhattan. When they arrive, they find themselves in an enormous city where all of its citizens are kids and young teens, and are somehow in adult age. As the scientists explore this hidden city, they begin to learn more about they’re culture and how they live and survive. Now, they must find out how all of this civilization began, and prevent them from starting a war.