Stars, Stings and Tickles

23 January 2009
Presented by Chris Smith.

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Why do we see stars in the sky? Why do stars twinkle? why can't we tickle ourselves and how to stinging nettles sting? We tackle these question in this weeks show. We also find out whether eyesight can improve with age, how fibre optics work, why water doesn't burn and we reveal what hypermiling is!

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