Extras

Video thumbnail: Science Trek Rivers: How Long?

Rivers: How Long?

Video thumbnail: Science Trek Rivers: River What's In A Name?

Science Trek

Rivers: River What's In A Name?

When is it a stream and when is it a river?

Rivers: River What's In A Name?

Video thumbnail: Science Trek Rivers: Life of a River

Science Trek

Rivers: Life of a River

Why are rivers so important? Learn more about rivers in this Science Trek video short.

Rivers: Life of a River

Video thumbnail: Science Trek The Web Show: Rivers

Science Trek

The Web Show: Rivers

How do rivers change our world? Find out in this episode of Science Trek: The Web Show.

The Web Show: Rivers