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.