In an old schoolroom in the Scottish Highlands, sculptor Michael Visocchi is working on Commensalis, a huge work that will be installed thousands of miles away, in Grytviken, an abandoned whaling station on the Antarctic island of South Georgia. Whaling ships and equipment were taken Grytviken and assembled there. Now it is an industrial scrapyard; ships rust on the shore, huge tanks decay and millions of left over rivets remain. Visocchi was struck by the similarity of shape of these rivets and the bumps of the barnacles on the bodies of living whales.Visocchi talks to presenter Julian May as he works on this project which is challenging in so many ways. South Georgia has no permanent population, so is a public artwork appropriate?