Everything you need to know about this weekendâs games.
The most spectacular cliff dwellings are the compact, masonry-walled communal habitations, or pueblos, that often completely fill the cliffs in which they are located. They were built by the Anasazi, the prehistoric ancestors of the present Pueblo Indians, and date from about a.d. 900 to about 1450.
The visual cliff was not only tested on human infants, it was applied to other species as well. A few of these species included rats, cats, turtles, cows, and chickens.