Here are todays additions to The Best Sites To Learn About The Gulf Oil Spill:

How big is the Deepwater Horizon oil spill? lets you use Google Earth to compare the size of the oil spill to your city.

Timeline: The Deepwater Horizon disaster is a…timeline.

BP sprays more chemicals into main Gulf oil leak is from USA Today and give the latest update on containment efforts. If you scroll down, you’ll see a nice graphic on the left.

How big is the Deepwater Horizon oil spill? comes from the BBC.