What causes Humans to Combust?

16 September 2011
Presented by Chris Smith.

Does cooking with gas taste better, why are yawns infectious, how does carbon dating work, what is spontaneous human combustion, why won't a nine year old blow his nose and how can contraceptives help ovarian diseases? Dr Chris takes on this week's slew of science from South Africa and also asks what fatherhod does for a man's testosterone levels.

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