What causes hurricanes?

What causes hurricanes? Why do we go grey? Do parallel universes exist? What causes hot flushes? Do plants benefit from being talked to?
02 November 2012
Presented by Chris Smith, Redi Tlhabi

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Hurricane Catarina

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What causes hurricanes? How does plastination work? Why do we go grey? Does grunting make muscles work harder? Do parallel universes exist? What causes hot flushes? Are there any IQ tests for babies? Do plants benefit from being talked to? Join Dr Chris for this week's round up of top science questions from South Africa.

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