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EPISODE · Jul 11, 2013 · 46 MIN

What is 20/20 vision? 11th July

from James O'Brien's Mystery Hour

Why are most batteries round, what is 20/20 vision, is the emergency siren copyrighted and why are there silent words in the English language?

Episode metadata supplied by the publisher feed · Published Jul 11, 2013

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What is 20/20 vision? 11th July

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