Just cows... and maybe a buffalo, ox and yak or two. What can you say about cows? Well, here are some udderly interesting facts: Old cows in India have their own nursing homes. Cows have almost 360-degree panoramic color vision. Cows have hollow horns and come in a variety of colors. Cows can walk up stairs, but not down again because their knees don't bend properly for going back down. Enjoy this screensaver of 52 paintings and pictures of cows.