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.

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.