Native American oral traditions began as humans migrated to North America via the Bering Strait land bridge. As populations moved south, unique cultures developed with thousands of languages. Each culture developed their own stories and mythology which were often part of religious ceremonies. Sacred stories have evolved over hundreds of generations and remain an important part of Native American traditions today. Storytellers were respected members of the community who passed down stories orally. Myths explained natural phenomena and cultural traditions, and continue to play a central role in traditional cultures by teaching lessons and rituals.