(edit)Keeping their 200lb frames afloat takes quite a bit of effort, which is why their handlers join them in the water to keep a close eye on their progress. (edit) 'Tigers have a natural desire and ability to swim,' said Dr Bhagavan Antle, who set up the tiger pool at his animal park in South Carolina. 'It is rarely seen and we wanted to be able to present it to people so they could really get the feel of that incredible beauty and grace that a tiger has in the water. 'Tigers have modified webbing between their toes that makes their...