Tap on link. You must read the sections on Hominid Species and, to a lesser extent Hominid Fossils. I recommend your reading the Creationist Argument section, but it is not required.
Tap visit the cave.
Look at the decorations and symbols. Explore the Kiva. Use the 3d capability if your server has that capability, otherwise look at slides. Tap the Chaco Anasazi link on the bottom left for a map of the Anasazi region. Also read the section on the archaeological description of Chetro Ketl.