10 Things to Know About: Season 7, Episode 3

7 - 3: Seaweed

With over 1,450km of rocky shoreline, Ireland's coast is surrounded by hundreds of species of seaweed. For centuries, this seaweed has been harvested by coastal communities and used by farmers for fertilising their fields, as a home remedy for bronchitis and chronic coughs, and is even said to be one of the two foods that St Colmcille survived on.