How do we vomit?

Do chemicals in food cause cancer, how do we vomit, how does the moon affect the tides?
03 June 2016
Presented by Chris Smith

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Do the chemicals in our food cause cancer, how do we vomit, how does the moon affect the tides, do tonsils extend vocal range, is cancer more common in certain races, how fast does electricity travel in water and could cancer be a catalyst for evolution? Plus, could we get a universal cancer vaccine?

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