Underwater archaeologists are taking to Loch Tay to try to uncover more about a submerged prehistoric woodland. The stumps of about 50 trees were discovered in 2005 - some of them are thought to be about 6,000 years old. The experts are now aiming to find their root system and establish the depth to which the trees are buried. Meanwhile, a campaign has been launched to help restore the reconstructed crannog, an ancient loch dwelling, which attracts thousands of visitors. The Scottish Trust for Underwater Archaeology will spend the next two weeks inspecting the drowned forest. They will be focusing...