Anthropologists often find the greatest beauty in art that expresses mythology or religion. Folklore can be considered an art when it maintains group solidarity or provides cultural validation. Ritual activities in native cultures are focused on beliefs that rituals can drive away bad spirits or give protection. The Tasaday people discovered in the 1970s exemplify human variability, adaptability, and universality. Cultural variability arises from limitations that allow different possibilities. Archeologists analyze socially learned prehistoric and historic traits through methods like excavation, stratification, and carbon dating.