The other day I was standing on the roof of the Metropolitan Museum (Just after seeing this awesomeness) and saw a jet trail that spanned the whole sky. It made me wonder what it would look like if Earth had a ring like Saturn (or Jupiter) did. As luck would have it, someone already figured it out:
I wonder how having rings would have affected our development, not only as a navigation tool but as a source of wonder and religion. Crazy!