Astronomers describe how to calculate the age of the universe. This movie requires a plug-in to be viewed. If you don't already have one of them installed, follow the links below:     Choose a viewing format: Streaming (28.8k Modem) (Requires RealPlayer) High Quality Play it! or Download it! ([an error occurred while processing this directive] 40Mb) (Requires Quicktime) Download the text only

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