Andy Goldsworthy, a contemporary sculptor now living in Scotland, has for years been exploring various sites of the world, leaving behind sculptures that are in harmony with the environment. His materials are drawn from nature itself and his works, like many natural things, are essentially ephemeral. For Goldsworthy, seeing and understanding nature is a way of renewing our links with the earth. Here we meet him in the Scottish countryside with Colin Renfrew, head of Cambridge University's Department of Archaeology. The two men discover surprising similarities between their interests in and approaches to nature.