1) Native American mythology is incredibly diverse, with numerous tribes and cultures across North and South America having their own unique traditions and stories. It encompasses deities, nature spirits, tricksters, and heroes, reflecting the deep connection between indigenous peoples and the natural world.

2) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.

3) The American Civil Rights Movement, led by figures like Martin Luther King Jr., fought for equal rights and helped bring about significant social and legislative changes.

4) The book series "The Chronicles of Narnia" by C.S. Lewis has sold over 100 million copies worldwide.