Tourists leave behind “lint bunnies” inside the world’s longest cave; volunteers have removed about 600 pounds of human debris | World News - The Times of India
Visitors to Mammoth Cave may expect to leave with memories of its vast underground passages, but they also leave something far less welcome behind. Fibres from clothing, strands of hair and tiny pieces of rubbish gradually collect along the routes through the world’s longest cave system, forming small balls nicknamed “lint bunnies”.