Comets and the Stardust Mission: Whatís in our Solar Systemís Freezer?

Comets and the Stardust Mission: Whatís in our Solar Systemís Freezer?

First Aired: 5/19/2008

Length: 44 minutes


New findings on comets.
 
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The occasional appearance of comets has awed humans throughout history. But how much do we really know about comets? Did a comet kill the dinosaurs? And, what can comets tell us about our own ancient history? With comet dust from NASAís Stardust mission, scientists like Hope Ishii, a Research Scientist at Lawrence Livermore National Laboratory, are beginning to answer these questions. She and high school teacher Tom Shefler look at how comets formed, their role in the Earth's history and the clues about what happened over 4 billion years ago.
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