Cliffs

Nina investigates how cliffs were made - with the help of her sight neuron, Luke, and her hearing neuron, Belle. Explorers Ben, Olivia and Sonny visit Nina in her workshop and discover that some cliffs are made from chalk, and chalk is made from crushed sea shells. Next they visit the Needles on the Isle of Wight to see how waves have worn away the rock to make big cliffs.