Nina investigates why rocks are stripy with the help of Luke, her sight neuron.

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

Meet the Neurons (0:55); --Why Are Some Rocks Stripy? (2:10); -- Senses Experiment (3:15); -- How Are Stripy Rocks Made? (2:57); -- Are Stripes Always Horizontal? (2:29); -- Summary: Why Are Some Rocks Stripy? (0:44); -- Credits: Stripy Rocks—Nina & the Neurons: Earth Explorers (1:32); .