Rivers have a life. They change the land through which they flow. They give us water to drink, energy we convert to electricity, and a place for plants and animals to live. But where do they start? How do they change?  IdahoPTV's Science Trek takes you down Idaho's Snake River as it explains river formation, use, and terminology. What is an inner and outer bank, an oxbow, a meander and what makes rapids, are some of the questions that will be answered.