http://news.com.com/2300-11397_3-6171238-1.html
It's about 4 times bigger than the planet Earth o_O
...Interesting. Geometric shapes do tend to form in nature, even though we only think of circles, but you can even get squares in biology as well as geology (the right angle is not a man made artifice!). While hexagons are probably the easiest and most common geometric shape after circles that you find in the natural world, it's ttill amazing to see one on Saturn like this and at that size!
(although if it was smaller we wouldn't have seen it in the first place ^_^)
Here's a pic of it:




















