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Watch as the best teachers on the planet battle it out for the title of Iron Science Teacher. In this zany competition teachers will have ten minutes to create a science activity. This week's "secret" ingredient - Valentine gifts! NASA's Mars Exploration Rovers, Spirit and Opportunity, have long outlived their life expectancy of three months. Join us as we sum up the rover data and explain how this information changes our view of Mars. After a week of analyzing the data from the Huygens probe, do scientists think of Titan differently? What were the unexpected findings? Which hypotheses were wrong? Which were correct? Join us as we talk to mission scientists at NASA's Jet Propulsion Laboratory and get the latest on this enigmatic moon. After yesterday's historic mission to the surface of Titan, what happens next? What do the new pictures of Saturn's largest moon tell us, and what does it mean for our understanding of earth? After its long journey to Saturn's largest moon, Titan, the Huygens probe is released from the Cassini spacecraft. The Huygens probe completes its descent to Titan, capturing hundreds of images on its way. Join Senior Scientist Paul Doherty as he gives us background on this incredible mission and sets the stage for the first close-up images of this mysterious moon. Join Senior Scientist Paul Doherty as we receive the first images of Titan, Jupiter's largest moon, from the European Space Agency headquarters in Darmstadt, Germany. The Huygens probe, released from the Cassini spacecraft, descended to Titan and captured hundreds of images of this mysterious moon. 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! 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!