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Ever wondered where that crust on your car battery comes from? Exploratorium staff member Chuck Mignacco explains galvanic corrosion and the basics of battery maintenance using a time-honored miracle solvent: Coke. Watch for a surprise guest at the end of the video. The Live @ cast and crew take a journey to our Nation's Capitol for a special politically-charged edition of Iron Science Teacher. The competitors must create a math or science activity that is politically correct and leaves no child behind. Cold anti-hydrogen atoms have been made, stored, and detected for the first time at ATHENA! We talked to the ATHENA team about this groundbreaking, historic event in particle physics and learned what's next. Watch as the best teachers on the planet battle it out for the title of Iron Science Teacher. In this zany competition teachers have ten minutes to create a science activity. This weeks secret ingredient: rulers and meter sticks!