Archaeologists have unearthed a unique 2,000-year-old wooden toilet seat from the Roman fort of Vindolanda in northern England.The seat was found in a muddy trench and has been preserved in the anaerobic conditions that exist at Vindolanda, media reports said."We know a lot about Roman toilets from previous excavations at the site and from other locations across the world, but never before have we had the pleasure of looking at a perfectly preserved wooden seat," Andrew Birley, director of excavations at Vindolanda, was quoted as saying."It is made from a very well-worked piece of wood and looks pretty comfortable," Birley added.