Experimenters Ethan and Eva visit Nina in her workshop and discover what the walls of an igloo mare made from and what they do to keep heat in. Next, they visit a real igloo to find out what helps heat it up inside. Finally, they do an experiment that explains how igloos are built to keep out the cold wind.

Originally released by BBC, 2015. Streaming video file encoded with permission for digital streaming by Infobase on January 17, 2017.

Meet the Neurons (0:56); --Are Igloos Cold Inside? (1:59); -- Senses Experiment (3:40); -- Indoor Ski Slope (2:57); -- Cold Wind Prevention (2:09); -- Summary: Are Igloos Cold Inside? (0:34); -- Credits: Igloos—Nina & the Neurons: Get Building (1:58); .