Landscape in the Lab

How exactly does a stream erode into bedrock? Insights into this basic geologic question have come from an experiment so ingeniously simple, you have to wonder why no one did it before. Modeling work always leads researchers back to the basics. And in the case of modeling stream erosion, one basic hypothesis goes back to G. K. Gilbert in 1877. What does this have to do with "Jurassic Tank"? Everything.