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06/01/2009 GMT

Roland Pease explores light's continuing role in the endless frontier of scientific progress.

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27 minutes

Space

The eclipses, spacecraft and astronauts changing our view of the Universe

The Curious Cases of Rutherford and Fry

The Curious Cases of Rutherford and Fry

A pair of scientific sleuths answer your perplexing questions. Ask them anything!

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