The concept of world trees is a prevalent motif in pre-Columbian Mesoamerican cosmologies and iconography. The cosmologies and philosophies of the Akan, Dogon, Serer and Dahomey were also significant. Traditional knowledge in such cosmologies is inextricably bound to ancestors, and ancestral lands. Constructed worlds often have cosmologies, both in the scientific and metaphysical senses of the word. Historically, there have been many ideas of the cosmos (cosmologies) and its origin (cosmogonies). She draws upon anarchist theory as well as Quechua and Aymara cosmologies. Some similar ideas appear in the Vedic and Hindu cosmologies. Fantasy worlds can also involve unique cosmologies. Like other Indian cosmologies, it assumes an infinite span of time and is cyclical. Two different cosmologies can be found in the Talmud. The Bianchi IX cosmologies include the Taub metric. A "devil spirit" is equivalent to a demon in most other Christian cosmologies. There is a huge diversity of such cosmologies. Such was the basis of their pre-colonial cosmologies. These findings were a first step to rule out some of many alternative cosmologies.