Want to get a feel for how big that oil spill in the Gulf is? It can be rather hard to tell in comparison to the Louisiana coast since we don't live there. Someone developed a site that will overlay the spill over someplace we know -- like Detroit. You can enter your own city.
As of May 6 (4 days ago now), when positioned over Detroit it reached from Pelee Island in Lake Erie to Port Huron, from Ann Arbor to the far side of Lake St. Clair, with a tendril reaching onward to London, Ont.