Mo and Finchy visit a national park where the Anasazi (a Navajo Indian word meaning the ancient ones) once lived for more than one thousand years. They made huge apartment houses made of stone built on ledges in the cliffs. But one day, they vanished. Where did they go? Why did they leave? Help scientists solve this mystery. Share your thoughts, along with your name, age, and state you live in, and we’ll post them on this blog.