Experimenters Dylan and Phoebe visit Nina in her workshop and discover why an arch is a strong shape. Next, they do an experiment to find out what helps arches keep their shape. Finally, they have a go at building an arch for themselves to see what makes them strong enough to hold up really heavy things, like trains!

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); --Why Do People Use Arches in Buildings? (2:14); -- Senses Experiment (2:38); -- Sand Box Arch Experiment (3:44); -- Why are Arches Made of Hard Materials? (2:06); -- Summary: Why Do People Use Arches in Buildings? (0:38); -- Credits: Arches—Nina & the Neurons: Get Building (1:58);.