CIA agents in Havana complaining of mental fog, dizziness and ear pain in 2016. Children in Miami in 1974, hyperventilating and wracked with abdominal pain. A medieval outbreak of the “dancing plague”. A chorus of meowing nuns. These mysterious and seemingly disparate events may have a simple explanation — and one that’s often overlooked when it comes to understanding strange new syndromes. For a full list of sources used in this episode visit Tim Harford.com.See omnystudio.com/listener for privacy information.

Why does economics get a bad rap? How did a small Hungarian airline wreak havoc in the 2000s? What cautionary tales can we glean from Tim’s own life? And what’s his favourite role-playing game? You sent in your questions and now - with the help of podcasting maestro Jacob Goldstein (What’s Your Problem?) - Tim is answering them. Do you have a question for Tim? Please email any queries you might have, however big or small, to [email protected] omnystudio.com/listener for privacy information.

You can gamble on horses or on the turn of a card - but Daniel Gould made a living betting on the outcome of the annual Eurovision Song Contest. Daniel made a profit because he studied the voting history of the competition, as well as the cultural and geo-political factors that predict which songs will triumph and which will score "nil point".     In 2018, Daniel was so sure of his system of reducing the risk that he took out a loan on his home and bet it on Israel's song to win...  only to see the entry from Cyrus suddenly rocketing up the leader board. Was Daniel about to lose everything? For a full list of sources used in this episode visit Tim Harford.comSee omnystudio.com/listener for privacy information.

Anna Marie Jarvis wanted a national holiday to honor the dedication and sacrifice of America's mothers. She wasn't the first person to propose a Mother's Day - but her campaign caught the imagination of the people and the ears of the politicians. Congress officially recognised Jarvis's Mother's Day in 1914 - but the indefatigable campaigner had allied herself with businessmen with vested interests in such an annual event. Mother's Day soon span out of its creator's control and caused an embittered Jarvis no end of heartache.       For a full list of sources used in this episode visit Tim Harford.comSee omnystudio.com/listener for privacy information.

It could cure any 'female ailment' - even cancer - said the adverts. But Lydia E. Pinkham’s Vegetable Compound was, in fact, just a concoction of herbs and alcohol of no proven medicinal merit. That didn't stop desperate American women from buying bottles of the stuff - and writing to Lydia Pinkham for medical advice.   Why did her customers shun 'expert' doctors and opt instead for quack medicines? And why, when Lydia Pinkham finally came in for criticism, did no one question the efficacy of her vegetable compound?   For a full list of sources for this episode, go to timharford.com.See omnystudio.com/listener for privacy information.