SpecialRelativity 
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It’s all relative. How many times have you heard that? Well, when you’re traveling close to the speed of light, everything really is relative; especially the passage of time. This week, Fraser and Pamela give you the skinny on Einstein’s Special Theory of Relativity. After listening to a few thought experiments, you too should be able to wrap your head around this amazing theory.
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*** http://www.astronomycast.com/2006/11/einsteins-theory-of-special-relativity/
-- Maggie