I took this photograph from the 94th floor of the Hancock Tower. The sun was setting and it was just perfect. The one thing I didn't notice at the time when I took it though was that the curvature of the Earth was so clearly visible. Now I guess this could be an optical illusion that the lens of the camera created, but my guess is it's the curvature of our planet. The calculations I did says that the horizon line in this photograph was about 40 miles away. So in conclusion I think we can say it's safe to assume that the world is in fact round!!!!