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What are the chances of an asteroid slamming into the Earth? Would it be catastrophic, similar to the possible event that caused the mass extinction of dinosaurs millions of years ago? According to scientists the chances of such a calamity does exist, although it is difficult to pinpoint with any degree of accuracy. In Ultrascience 2: Cosmic Collision, viewers can look on as researchers explain how modern technology has created tools and instruments for detecting meteors and other objects that might collide with the planet in the future.