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Title: Confused with the statements about Whale Oil and Hubble
Review: I rented Blu-ray version. I was enjoying this as a review of my history knowledge as I studied recently. Then there was a statement about whaling and that even the Hubble telescope uses the whale oil. I started my own search. No where is the information to prove this to be true. Then the feeling of doubt arose. It narrates with authority but I no longer sit and enjoy the learning process. It is stressful that double checking is needed for the show that should enlighten us!
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