A deadly poison created by mixing sunlight and oil in shallow water

While a huge body of research has been done on the immense oil spill in the Gulf Coast, another, smaller, spill in the San Francisco Bay has shown not only that we don't know much about how different types of oil behave in the environment — but also that they can interact in ways we didn't predict. » 12/30/11 7:30am 12/30/11 7:30am