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  1.

    Harry Potter: How Many Wizards?

    Fans have long debated - just how many wizards live among us?

  2. The high street, 91福利社 births, Harry Potter wizardry

    Is WH Smith really the worst on the high street? Plus how safe is giving birth at home?

  3. Australia Calling

    Do one in seven businessmen throw out their underwear after wearing them once?

  4. Forecasting rain, Teabags, Voter ID trials

    How to read the weather forecast, plus measuring the amount of tea we drink.

  5. James Comey: Basketball Superstar?

    James Comey is very tall - but what are the chances he could have been a pro baller?

  6. Child poverty, Progress 8, How green is grass?

    Are more working families in poverty? Plus exploring the new school league tables.

  7. Tulipmania Mythology

    What is the truth behind the 17th Century Dutch craze for tulips?

  8. Abortion, Modern slavery, Math versus maths

    The British abortion statistics gaining attention in Ireland's referendum debate.

  9. Exposing the Biases We Have of the World

    Statistician Hans Rosling鈥檚 family talk about the book they co-wrote about preconceptions

  10. Cancer screening, the Windrush Generation, Audiograms

    Calculating the benefits and risks of breast screening. Plus, patchy citizenship data.

  11. Puerto Rico: Statistics v Politics

    Why some fear the statistics authority is about to lose its independence

  12. Straws, Women on boards, Animals born each day

    Measuring plastic pollution, female FTSE directors and counting animal offspring.

  13. How Should We Think About Spending?

    Tim Harford talks to economist Dan Ariely about the psychology of money.

  14. Are We Breathing Unsafe Air?

    The W.H.O. say 95% of people in cities breathe unsafe air, but what does 'unsafe' mean?

  15. Why London鈥檚 Murder Rate is Being Compared to New York鈥檚

    Finding out if London is now more deadly than New York.

  16. How Deadly Was 1920s Melbourne?

    How accurate is the murder rate in the crime series Miss Fisher鈥檚 Murder Mysteries?

  17. Were 鈥楨xtra鈥� Votes Counted in Russia鈥檚 Presidential Election?

    We look at voting data to investigate allegations of election fraud in Russia

  18. Factchecking Trump on Trade

    The US President regularly talks about America's trade deficit - do his figures stack up?

  19. Did Sir Roger Bannister make the 鈥榠mpossible鈥� possible?

    A mile in under four minutes. Did positive thinking propel dozens to do the same?

  20. Women, the Oscars and the Bechdel Test

    Ninety years鈥� worth of Best Picture winning films under the spotlight.

  21. The Winter Olympics

    Which is the most successful country? Plus the chances of a dead heat.

  22. Debunking guide 鈥� on a postcard

    How to question dubious statistics in just a few short steps

  23. UN rape claims, Stalin, Mr Darcy

    Back of the envelope calculations on rape, and how many died under Stalin?

  24. Russia: Has drinking fallen by 80% in five years?

    Alcohol consumption has fallen sharply according to Russia鈥檚 health ministry.

  25. The Dow, Tampons, Parkrun part II

    Why the biggest ever fall in the Dow wasn't, and how much do women spend on tampons?

  26. Is China On Track to End Poverty by 2020?

    We investigate whether the Chinese government can really achieve its extraordinary pledge

  27. Transgender numbers, parkrun and snooker

    How many transgender people are there in the UK? Plus a statistical take on parkruns.

  28. Is the US Census Under Threat?

    The survey question that could affect the accuracy of its results.

  29. A girl's first time, Shark's stomachs, Prime numbers

    Challenging the claim that one in three girls' first sexual experience is rape.

  30. Real Lives Behind the Numbers

    How individuals manage their money - the personal stories behind economic data.

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