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How much heat do you lose from your head?
Is it true that 40% of your body's heat loss comes from your head?
Every winter its the same, someone will tell you to put a hat on to save your body from losing all of its heat. But how much heat do you actually lose from your head? We take you on a journey from arctic conditions to a hot tub in Canada to explain why there might actually be more than one answer...
Presenter: Tim Harford
Producer: Leoni Robertson and Lizzy McNeill
Unlock the history and truth behind the data with The OU
Explore how numbers shape, and sometimes mislead us, with The Open University.
When can you trust statistics?
BBC Ideas discovers three easy ways to help make sense of statistics.
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Tim Harford explains the numbers and statistics used in everyday life.
