PBS:  Mandan Indians  This PBS site gives an in-depth overview of the life of the Mandan Indians, including when Lewis and Clark met them.

The Mandan  This site explores the history of the Mandan Indians, and includes a wide variety of pictures to further emphasize their culture.

National Geographic:  The Mandan-Hidatsa  This National Geographic website gives an overview of the time that Lewis and Clark spent with the Mandan-Hidatsa.