Nina and the Neurons

Waterfalls (8x25)

Air date: Nov 29, 2013

Nina investigates how waterfalls were made - with the help of Belle, her hearing neuron. Explorers Maya and Ollie visit Nina in her workshop and discover that waterfalls are made from layers of hard and soft rock. Next they visit a waterfall in Wales and find out that it was made because the soft rock wears away quicker than hard rock.