Nina examines how cliffs were created with the help of sight neuron Luke.

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

Meet the Neurons (0:56); --Why Are Cliffs Shaped Like This? (2:27); -- Senses Experiment (3:50); -- What is Erosion? (2:57); -- Erosion Experiment (1:56); -- Summary: Why Are Cliffs Shaped Like This? (0:29); -- Credits: Cliffs—Nina & the Neurons: Earth Explorers (1:34); .