Nina is taken to see Old Faithful in Yellowstone National Park as she and Ollie investigate geysers.

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); --What is a Geyser? (2:14); -- Senses Experiment (3:40); -- A Visit to Old Faithful (3:35); -- Why Geysers Erupt Intermittently (1:40); -- Summary: What is a Geyser? (0:40); -- Credits: Geysers—Nina & the Neurons: Earth Explorers (1:32); .