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Join the Live@ crew and NASA scientists as we delve into the ancient knowledge of the Chacoans, daily sky watchers who amassed a great knowledge about the movements of the sun. And learn why today's astronomers and solar physicists continue to watch the sun, using modern ground-based observatories and orbiting space telescopes. The only thing to beat out Iron Science Halloween! Holiday madness right when you could use a laugh.... today's secret ingredient: fruitcake! Originally produced for NOVA in 1982, Jon Else's film takes a look behind the scenes at the Exploratorium. The film follows the development of three exhibits from prototype to museum floor. Palace of Delights won a Cine Golden Eagle Award and was shown at the International Film and Television Festival of New York. A collection of random quotes by Exploratorium founder, Dr.Frank Oppenheimer. In this short film Frank Oppenheimer gives us some of his visions for what he is creating in the beautiful Palace of Fine Arts. This film dates back to 1969, the year that the Exploratorium was founded. Jon Boorstin's 1974 film, Exploratorium, was nominated for the Academy Award for Documentary Short Subject. This film explores the museum through imagery and sound, without a narrative voice-over. Shortly after Frank Oppenheimer's death, Exploratorium staff share their experiences working with Frank, and tell us why staff retention at the Exploratorium was never an issue. Paul Doherty and Eric Wegryn explore the latest photos of Titan, Saturn’s largest moon, taken from only 750 miles away by the Huygens probe. Watch as Exploratorium staff and local teachers compete for the title of Iron Science Teacher. Each contestant has 10 minutes to make a science lesson out of a science ingredient. This is a Halloween edition of Iron Science Teacher, and today's secret ingredient is: Bones!