Nagual, a shaman, or magician (brujo) from Mesoamerican folklore who is capable of transforming into animal forms (shape-shifting). He is said to be capable of “walking between worlds.” Carlos Casteñeda, anthropologist and author of A Separate Reality (1971), refers to nagual as an attainable realm of nonordinary reality, lying outside our perceptions. Image: N.Y. Public Library Picture Collection. Caption: “Cro-Magnon profile ca. 13,000 years old. [Found in a] cave near Vienne, France.”