On April 20, 2010, a gas explosion rocked the Deepwater Horizon oil rig in the Gulf of Mexico, beginning what would become one of the largest oil spills ever in U.S. waters. As the scope of the disaster became clear, scientists and volunteers from across the country raced to the coast, determined to try to save the region's diverse wildlife. With millions of gallons of oil flowing into the Gulf every day, however, the job would be a long and difficult...