Ronnie and William visit Nina in her workshop, where they learn everything about the Grand Canyon.

Originally released by BBC Worldwide Ltd, 2013. Streaming video file encoded with permission for digital streaming by Infobase on November 17, 2016.

Meet the Neurons --(0:55) -- What is the Grand Canyon? -- (2:19) -- Senses Experiment -- (3:52) -- How Big is the Grand Canyon? -- (2:10) -- How the River Helped Shape the Canyon -- (2:24) -- Summary: What is the Grand Canyon -- (0:37) -- Credits: Grand Canyon-Nina & the Neurons: Earth Explorers -- (1:31).