creator, preserver, and destroyer, and at the same time just one. An important characteristic of Mesoamerican religion was the dualism among the divine entities. The gods represented the confrontation between opposite poles: the positive, exemplified by light, the masculine, force, war, the sun, etc.; and the negative, exemplified by darkness, the feminine, repose, peace, the moon, etc. The typical Mesoamerican cosmology sees the world as separated into a day world watched by the sun and a night world watched by the moon. More importantly, the three superposed levels of the world are united by a Ceiba tree (Yaxche''' in Mayan). The geographic vision is also tied to the cardinal points. Certain geographical features are linked to different parts of this cosmovision. Thus mountains and tall trees connect the middle and upper worlds; caves connect the middle and nether worlds. Sacrifice Generally, sacrifice can be divided into two types: autosacrifice and human sacrifice. The different forms of sacrifice are reflected in the imagery used to evoke ideological structure and sociocultural organization in Mesoamerica. In the Maya area, for example, stele depict bloodletting rituals performed by ruling elites, eagles and jaguars devouring human hearts, jade circles or necklaces that represented hearts, and plants and flowers that symbolized both nature and the blood that provided life. Imagery also showed pleas for rain or pleas for blood, with the same intention to replenish the divine energy. Ritual sacrifice was done in efforts to appease the gods, and was done with the purpose of protection of the population. Autosacrifice Autosacrifice, also called bloodletting, is the ritualized practice of drawing blood from oneself. It is commonly seen or represented through iconography as performed by ruling elites in highly ritualized ceremonies, but it was easily practiced in mundane sociocultural contexts (i.e., non-elites could perform autosacrifice). The act was typically performed with obsidian prismatic blades or stingray spines, and blood was drawn from piercing or cutting the tongue, earlobes, and/or genitals (among other locations). Another form of autosacrifice was conducted by pulling a rope with attached thorns through the tongue or earlobes. The blood produced was then collected on amate held in a bowl. Autosacrifice was not limited to male rulers, as their female counterparts often performed these ritualized activities. They are typically shown performing the rope and thorns technique. A recently discovered queen's tomb in the Classic Maya site of Waka (also known as El Perú) had