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Historian Alice Dreger's new book, Galileo's Middle Finger: Heretics, Activists, and the Search for Justice in Science, is a funny, surprising story of Dreger's career as an activist, researcher, and advocate for evidence-based activism. She joins us.

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BP says all the oil  from last week's spill is now cleaned up. But activists worry about the possibility of future spills. Elizabeth Brackett has the latest details. View a graphic on the Lake Michigan oil spill compared to the 10 biggest U.S. oil spills by volume.